diff --git a/.idea/dictionaries/project.xml b/.idea/dictionaries/project.xml
index 5765eb4..4fb2906 100644
--- a/.idea/dictionaries/project.xml
+++ b/.idea/dictionaries/project.xml
@@ -4,6 +4,7 @@
       <w>aurovite</w>
       <w>callanite</w>
       <w>caterium</w>
+      <w>heatsink</w>
       <w>larrussite</w>
       <w>quickwire</w>
       <w>siterite</w>
diff --git a/main.py b/main.py
index 4062c3f..c78d1cb 100644
--- a/main.py
+++ b/main.py
@@ -34,7 +34,7 @@ class Production(BaseModel):
     quantity: float
 
 class ProductionChain:
-    def __init__(self):
+    def __init__(self, preferred_recipes: Optional[Dict[Items, Recipe]] = None):
         self.item_to_recipies: Dict[Items, list[Recipes]] = defaultdict(list)
         for r in Recipes:
             for o in r.value.outputs:
@@ -49,9 +49,11 @@ class ProductionChain:
         self.production_chain: Dict[str, float] = defaultdict(float)
         self.excess: Dict[Items, float] = defaultdict(float)
         self.byproduct: Dict[Items, float] = defaultdict(float)
+        self.preferred_recipes = preferred_recipes or {}
 
     def get_recipe(self, item: Items) -> Optional[Recipe]:
-        # TODO: make logic for priority selection of recipes
+        if item in self.preferred_recipes:
+            return self.preferred_recipes[item]
         return self.item_to_recipies.get(item, (None,))[0]
 
     def calculate_excess(self, production: Dict[Items, float], demand: Dict[Items, float], raw_resources: Dict[Items, float]):
@@ -102,7 +104,12 @@ class ProductionChain:
                     levels.append(target_quantity / quantity)
 
             production_level = max(levels)
+            if production_level == 0:
+                continue
             production_chain[recipe.name] += production_level
+            if production_chain[recipe.name] < 0:
+                del(production_chain[recipe.name])
+                production_level = 0
             for out, quantity in recipe.outputs.items():
                 production[out] += production_level * quantity
             for byproduct, quantity in recipe.byproducts.items():
@@ -153,13 +160,77 @@ def index():
     name_to_item = {i.value.name: i for i in Items}
 
     result = None
-    error = None
-    selected_item = item_names[0] if item_names else ""
-    selected_rate = 60.0
+    error_msgs: List[str] = []
 
-    # Read from query parameters for bookmarkable URLs
-    item_name = request.args.get("item") or selected_item
-    rate_str = request.args.get("rate")
+    # --------------------
+    # Parse targets (support multiple products)
+    # --------------------
+    # Accept both legacy single `item`/`rate` and indexed `item_1`/`rate_1`, ...
+    # Determine how many indexed rows we have
+    indexed_pairs: List[Tuple[str, str]] = []
+    max_idx = 0
+    for key in request.args.keys():
+        if key.startswith("item_"):
+            try:
+                idx = int(key.split("_", 1)[1])
+                max_idx = max(max_idx, idx)
+            except ValueError:
+                pass
+    for i in range(1, max_idx + 1):
+        indexed_pairs.append((request.args.get(f"item_{i}"), request.args.get(f"rate_{i}")))
+
+    # Build targets_ui (for rendering the form) and targets dict (for compute)
+    targets_ui: List[dict] = []
+    targets: Dict[Items, float] = defaultdict(float)
+
+    def _add_target_row(item_name: Optional[str], rate_str: Optional[str]):
+        nonlocal targets, targets_ui
+        if not item_name and not rate_str:
+            return
+        item_name = (item_name or "").strip()
+        rate_val: Optional[float] = None
+        if rate_str is not None and rate_str != "":
+            try:
+                rate_val = float(rate_str)
+                if rate_val < 0:
+                    raise ValueError
+            except (TypeError, ValueError):
+                error_msgs.append(f"Invalid rate for product '{item_name or '(missing)'}'. Enter a non-negative number.")
+                rate_val = None
+        if item_name:
+            targets_ui.append({"item": item_name, "rate": rate_val if rate_val is not None else 0.0})
+            if rate_val is not None:
+                item_obj = name_to_item.get(item_name)
+                if item_obj is None:
+                    error_msgs.append(f"Unknown item '{item_name}'.")
+                else:
+                    targets[item_obj] += rate_val
+        elif rate_val is not None:
+            # Rate without item name – just keep it in UI
+            targets_ui.append({"item": "", "rate": rate_val})
+
+    if indexed_pairs:
+        for item_nm, rate_s in indexed_pairs:
+            _add_target_row(item_nm, rate_s)
+    else:
+        # Legacy single controls
+        default_item = item_names[0] if item_names else ""
+        single_item = request.args.get("item") or default_item
+        single_rate = request.args.get("rate")
+        _add_target_row(single_item, single_rate)
+        if not request.args:
+            # Initial load: ensure at least one default row
+            targets_ui = [{"item": default_item, "rate": 60.0}]
+            if default_item:
+                item_obj0 = name_to_item.get(default_item)
+                if item_obj0:
+                    targets[item_obj0] += 60.0
+
+    # Selected defaults are taken from the first row (for compatibility with existing template pieces)
+    selected_item = targets_ui[0]["item"] if targets_ui else (item_names[0] if item_names else "")
+    selected_rate = targets_ui[0]["rate"] if targets_ui else 60.0
+
+    # Optional top-level recipe (applies only when exactly one target)
     selected_recipe = request.args.get("recipe") or ""
 
     # Parse per-item recipe overrides from query params recipe_for_<slug(item)>
@@ -184,23 +255,9 @@ def index():
         if value in candidates:
             overrides[item_enum] = value
 
-    rate = None
-    if rate_str is not None and rate_str != "":
-        try:
-            rate = float(rate_str)
-            if rate < 0:
-                raise ValueError
-        except (TypeError, ValueError):
-            error = "Please enter a valid non-negative number for rate (items per minute)."
-            rate = None
-
-    selected_item = item_name
-    if rate is not None:
-        selected_rate = rate
-
-    # Determine candidate recipes for the selected output item
+    # Candidate recipes for the (first) selected item (single-target convenience)
     recipe_options: List[str] = []
-    item_obj_for_options = name_to_item.get(selected_item)
+    item_obj_for_options = name_to_item.get(selected_item) if len(targets) <= 1 else None
     if item_obj_for_options is not None:
         for r in Recipes:
             recipe = r.value
@@ -224,61 +281,129 @@ def index():
     # Compute and also prepare per-item override options based on resulting chain
     overrides_ui: List[dict] = []
 
-    if not error and item_name and rate is not None:
-        item_obj = name_to_item.get(item_name)
-        if item_obj is None:
-            error = "Unknown item selected."
-        else:
-            targets = {item_obj: rate}
-            raw, steps, outputs, unused = compute_chain(targets, preferred_by_output=preferred)
-            result = {
-                "targets": {item_name: rate},
-                "raw": raw,
-                "steps": steps,
-                "outputs": outputs,
-                "unused": unused,
-            }
+    if targets:
+        # Translate preferred mapping (Items -> recipe name) into objects and pass to ProductionChain
+        preferred_recipes_obj: Optional[Dict[Items, Recipe]] = None
+        if preferred:
+            name_to_recipe = {r.value.name: r.value for r in Recipes}
+            preferred_recipes_obj = {}
+            for itm, rec_name in preferred.items():
+                rec_obj = name_to_recipe.get(rec_name)
+                if rec_obj:
+                    preferred_recipes_obj[itm] = rec_obj
+        prod_chain = ProductionChain(preferred_recipes=preferred_recipes_obj)
+        prod_chain.compute_chain(targets)
 
-            # Collect unique output items from steps
-            unique_items = []
-            seen = set()
-            for s in steps:
-                item_nm = s.get("item")
-                if item_nm and item_nm not in seen:
-                    seen.add(item_nm)
-                    unique_items.append(item_nm)
-            # For each item, compute candidate recipes and current selection
-            for item_nm in unique_items:
-                item_enum2 = name_to_item.get(item_nm)
-                if not item_enum2:
-                    continue
-                candidates = []
-                for r in Recipes:
-                    rec = r.value
-                    if item_enum2 in rec.outputs:
-                        candidates.append({
-                            "name": rec.name,
-                            "building": rec.building.value.name,
-                        })
-                if len(candidates) <= 1:
-                    continue  # only show when alternates exist
-                candidates.sort(key=lambda x: (x["name"]))
-                sel = None
-                if preferred and item_enum2 in preferred:
-                    sel = preferred[item_enum2]
-                slug = _slugify(item_nm)
-                overrides_ui.append({
-                    "item_name": item_nm,
-                    "slug": slug,
-                    "options": candidates,
-                    "selected": sel or "",
+        # Build UI-facing structures from ProductionChain state
+        raw = {itm.value.name: qty for itm, qty in prod_chain.raw_resources.items() if qty > 0}
+        unused = {itm.value.name: qty for itm, qty in prod_chain.byproduct.items() if qty > 0}
+        excess = {itm.value.name: qty for itm, qty in prod_chain.excess.items() if qty > 0}
+        outputs = {itm.value.name: qty for itm, qty in prod_chain.production.items() if qty > 0}
+
+        # Steps per recipe
+        steps = []
+        for recipe_name, level in prod_chain.production_chain.items():
+            rec = prod_chain.recipe_name_to_obj.get(recipe_name)
+            if not rec:
+                continue
+            chosen_item = None
+            if rec.outputs:
+                demanded = sorted(rec.outputs.keys(), key=lambda it: prod_chain.demand.get(it, 0.0), reverse=True)
+                chosen_item = demanded[0]
+            if not chosen_item:
+                continue
+            per_building_output = rec.outputs[chosen_item]
+            buildings_float = float(level)
+            buildings = ceil(buildings_float) if buildings_float > 0 else 0
+            utilization = (buildings_float / buildings) if buildings > 0 else 0.0
+            target_rate_item = buildings_float * per_building_output
+            # Compute per-step input item rates for this recipe at the computed level
+            step_inputs = []
+            for inp_item, qty_per_building in rec.inputs.items():
+                rate = buildings_float * qty_per_building
+                step_inputs.append({
+                    "item": inp_item.value.name,
+                    "rate": rate,
                 })
+            # Sort inputs by descending rate for a stable display
+            step_inputs.sort(key=lambda x: x["rate"], reverse=True)
+            steps.append({
+                "item": chosen_item.value.name,
+                "recipe": rec.name,
+                "building": rec.building.value.name,
+                "target_rate": target_rate_item,
+                "per_building_output": per_building_output,
+                "buildings_float": buildings_float,
+                "buildings": buildings,
+                "utilization": utilization,
+                "inputs": step_inputs,
+            })
 
-    # Build reset query (clear overrides)
-    reset_query = f"?item={selected_item}&rate={selected_rate}"
+        # Aggregate targets for display
+        result_targets = {}
+        for itm, qty in targets.items():
+            if qty > 0:
+                result_targets[itm.value.name] = qty
+
+        result = {
+            "targets": result_targets,
+            "raw": raw,
+            "steps": steps,
+            "outputs": outputs,
+            "unused": unused,
+            "excess": excess,
+        }
+
+        # Collect unique output items from steps for override options
+        unique_items = []
+        seen = set()
+        for s in steps:
+            item_nm = s.get("item")
+            if item_nm and item_nm not in seen:
+                seen.add(item_nm)
+                unique_items.append(item_nm)
+        for item_nm in unique_items:
+            item_enum2 = name_to_item.get(item_nm)
+            if not item_enum2:
+                continue
+            candidates = []
+            for r in Recipes:
+                rec = r.value
+                if item_enum2 in rec.outputs:
+                    candidates.append({
+                        "name": rec.name,
+                        "building": rec.building.value.name,
+                    })
+            if len(candidates) <= 1:
+                continue
+            candidates.sort(key=lambda x: (x["name"]))
+            sel = None
+            if preferred and item_enum2 in preferred:
+                sel = preferred[item_enum2]
+            slug = _slugify(item_nm)
+            overrides_ui.append({
+                "item_name": item_nm,
+                "slug": slug,
+                "options": candidates,
+                "selected": sel or "",
+            })
+
+    # Build reset query (clear overrides) while preserving current targets
+    if indexed_pairs or len(targets_ui) > 1:
+        # Multi-target
+        parts = []
+        for idx, row in enumerate(targets_ui, start=1):
+            parts.append(f"item_{idx}={row['item']}")
+            parts.append(f"rate_{idx}={row['rate']}")
+        reset_query = "?" + "&".join(parts)
+    else:
+        reset_query = f"?item={selected_item}&rate={selected_rate}"
     if selected_recipe:
         reset_query += f"&recipe={selected_recipe}"
 
+    # Combine error messages
+    error = " ".join(error_msgs) if error_msgs else None
+
     return render_template(
         "index.html",
         items=item_names,
@@ -290,6 +415,7 @@ def index():
         selected_recipe=selected_recipe,
         overrides_ui=overrides_ui,
         reset_query=reset_query,
+        targets_ui=targets_ui,
     )
 
 
@@ -299,6 +425,6 @@ def create_app():
 
 if __name__ == "__main__":
     # For local dev: python main.py
-    # app.run(host="0.0.0.0", port=5000, debug=True)
-    prod_chain = ProductionChain()
-    prod_chain.compute_chain({Items.ModularFrame: 1.5})
\ No newline at end of file
+    app.run(host="0.0.0.0", port=5000, debug=True)
+    # prod_chain = ProductionChain()
+    # prod_chain.compute_chain({Items.CateriumHeatsink: 10.0})
\ No newline at end of file
diff --git a/plus.py b/plus.py
index 69221a0..fc3faa9 100644
--- a/plus.py
+++ b/plus.py
@@ -12,6 +12,8 @@ class Machines(Enum):
     Sorter = Machine(name="Sorter")
     Crusher = Machine(name="Crusher")
     Foundry = Machine(name="Foundry")
+    FlexibleBlastFurnace = Machine(name="Flexible Blast Furnace")
+    Reformer = Machine(name="Reformer")
 
 class Items(Enum):
     IronIngot = Item(name="Iron Ingot")
@@ -71,6 +73,18 @@ class Items(Enum):
     BronzeFrame = Item(name="Bronze Frame")
     AILimiter = Item(name="AI Limiter")
     Water = Item(name="Water")
+    CrushedCaterium = Item(name="Crushed Caterium")
+    CateriumHeatsink = Item(name="Caterium Heatsink")
+    MoltenIron = Item(name="Molten Iron")
+    MoltenCopper = Item(name="Molten Copper")
+    MoltenTin = Item(name="Molten Tin")
+    Steam = Item(name="Steam")
+    MoltenBrass = Item(name="Molten Brass")
+    BrassIngot = Item(name="Brass Ingot")
+    BrassPlates = Item(name="Brass Plates")
+    BrassPipes = Item(name="Brass Pipes")
+    ColdSlag = Item(name="Cold Slag")
+    FanBlades = Item(name="Fan Blades")
 
 class RawResources(Enum):
     Water = Items.Water
@@ -177,6 +191,16 @@ class Recipes(Enum):
         },
         inputs={Items.CrushedLarrussite: 120.0},
     )
+    CrushedCaterium = Recipe(
+        name="Crushed Caterium",
+        building=Machines.Sorter,
+        outputs={
+            Items.CrushedCaterium: 80.0,
+            Items.CrushedCopper: 40.0,
+            Items.CrushedGangue: 30.0,
+        },
+        inputs={Items.CrushedAurovite: 120.0},
+    )
     # Smelter
     # - smelting
     IronIngot = Recipe(
@@ -197,6 +221,12 @@ class Recipes(Enum):
         outputs={Items.TinIngot: 15.0},
         inputs={Items.CrushedTin: 15.0},
     )
+    CateriumIngot = Recipe(
+        name="Caterium Ingot",
+        building=Machines.Smelter,
+        outputs={Items.CateriumIngot: 40.0},
+        inputs={Items.CrushedCaterium: 40.0},
+    )
     # - Ingots
     ImpureIronIngot = Recipe(
         name="Impure Iron Ingot",
@@ -219,8 +249,8 @@ class Recipes(Enum):
     ImpureCateriumIngot = Recipe(
         name="Impure Caterium Ingot",
         building=Machines.Smelter,
-        inputs={Items.CrushedAurovite: 40.0},
         outputs={Items.CateriumIngot: 24.0},
+        inputs={Items.CrushedAurovite: 40.0},
     )
     ZincIngot = Recipe(
         name="Zinc Ingot",
@@ -235,6 +265,12 @@ class Recipes(Enum):
         outputs={Items.Glass: 20.0},
         inputs={Items.Sand: 30.0},
     )
+    CastIronScrew = Recipe(
+        name="Cast Iron Screw",
+        building=Machines.Smelter,
+        outputs={Items.Screws: 40.0},
+        inputs={Items.IronIngot: 20.0},
+    )
     # Constructor
     # - Standard Parts
     IronPlate = Recipe(
@@ -309,6 +345,18 @@ class Recipes(Enum):
         outputs={Items.ZincPlates: 15.0},
         inputs={Items.ZincIngot: 12.5},
     )
+    RolledBronzePlate = Recipe(
+        name="Rolled Bronze Plate",
+        building=Machines.Constructor,
+        outputs={Items.BronzePipes: 16.0},
+        inputs={Items.BronzePlates: 8.0},
+    )
+    CompactedIronPlate = Recipe(
+        name="Compacted Iron Plate",
+        building=Machines.Constructor,
+        outputs={Items.ReinforcedIronPlate: 3.0},
+        inputs={Items.IronPlate: 20.0},
+    )
     # - Electronics
     IronWire = Recipe(
         name="Iron Wire",
@@ -353,7 +401,13 @@ class Recipes(Enum):
         outputs={Items.Concrete: 15.0},
         inputs={Items.CrushedGangue: 45.0},
     )
-
+    # - Industrial Parts
+    BrassPlates = Recipe(
+        name="Brass Plates",
+        building=Machines.Constructor,
+        outputs={Items.BrassPlates: 18.0},
+        inputs={Items.BrassIngot: 25.0},
+    )
     # Foundry
     # - Building Parts
     SolarCell = Recipe(
@@ -406,6 +460,24 @@ class Recipes(Enum):
             Items.Rotor: 3.75,
         },
     )
+    SlagConcrete = Recipe(
+        name="Slag Concrete",
+        building=Machines.Assembler,
+        outputs={Items.Concrete: 22.5},
+        inputs={
+            Items.ColdSlag: 33.75,
+            Items.CrushedGangue: 11.25,
+        },
+    )
+    FanBlades = Recipe(
+        name="Fan Blades",
+        building=Machines.Assembler,
+        outputs={Items.FanBlades: 7.5},
+        inputs={
+            Items.BrassPlates: 8.0,
+            Items.IronRod: 22.5,
+        },
+    )
     # - Standard Parts
     TinPlate = Recipe(
         name="Tin Plate",
@@ -470,6 +542,25 @@ class Recipes(Enum):
             Items.BronzeBeam: 7.5,
         },
     )
+    FastenedFrame = Recipe(
+        name="Fastened Frame",
+        building=Machines.Assembler,
+        outputs={Items.ModularFrame: 20.0},
+        inputs={
+            Items.ReinforcedIronPlate: 15,
+            Items.Screws: 150,
+        },
+    )
+    BrassPipes = Recipe(
+        name="Brass Pipes",
+        building=Machines.Assembler,
+        outputs={Items.BrassPipes: 12.5},
+        inputs={
+            Items.BrassPlates: 15.0,
+            Items.CopperRod: 7.5
+        },
+    )
+    # - Electronics
     AILimiter = Recipe(
         name="AI Limiter",
         building=Machines.Assembler,
@@ -479,5 +570,101 @@ class Recipes(Enum):
             Items.TinnedWire: 18.0,
         },
     )
+    # - Industrial
+    CateriumHeatsink = Recipe(
+        name="Caterium Heatsink",
+        building=Machines.Assembler,
+        outputs={Items.CateriumHeatsink: 10.0},
+        inputs={
+            Items.CateriumPlate: 28.0,
+            Items.CopperBusbars: 10.0,
+        },
+    )
+    # Flexible Blast Furnace
+    # - Molten Metals
+    MoltenIron = Recipe(
+        name="Molten Iron",
+        building=Machines.FlexibleBlastFurnace,
+        outputs={Items.MoltenIron: 60.0},
+        inputs={
+            Items.CrushedIron: 120.0,
+        },
+    )
+    MoltenCopper = Recipe(
+        name="Molten Copper",
+        building=Machines.FlexibleBlastFurnace,
+        outputs={Items.MoltenCopper: 60.0},
+        inputs={
+            Items.CrushedCopper: 120.0,
+        },
+    )
+    MoltenTin = Recipe(
+        name="Molten Tin",
+        building=Machines.FlexibleBlastFurnace,
+        outputs={Items.MoltenTin: 60.0},
+        inputs={
+            Items.CrushedTin: 120.0,
+        },
+    )
+    # - Alloys
+    MoltenBrass = Recipe(
+        name="Molten Brass",
+        building=Machines.FlexibleBlastFurnace,
+        outputs={Items.MoltenBrass: 60.0},
+        inputs={
+            Items.CrushedZinc: 32.0,
+            Items.MoltenCopper: 20.0,
+        },
+    )
+    # Reformer
+    # - Ingots
+    CastIronIngot = Recipe(
+        name="Cast Iron Ingot",
+        building=Machines.Reformer,
+        outputs={
+            Items.IronIngot: 180.0,
+            Items.Steam: 60.0
+        },
+        inputs={
+            Items.MoltenIron: 60.0,
+            Items.Water: 60.0,
+        },
+    )
+    CastCopperIngot = Recipe(
+        name="Cast Copper Ingot",
+        building=Machines.Reformer,
+        outputs={
+            Items.CopperIngot: 144.0,
+            Items.Steam: 24.0
+        },
+        inputs={
+            Items.MoltenCopper: 48.0,
+            Items.Water: 24.0,
+        }
+    )
+    CastTinIngot = Recipe(
+        name="Cast Tin Ingot",
+        building=Machines.Reformer,
+        outputs={
+            Items.TinIngot: 180.0,
+            Items.Steam: 20.0
+        },
+        inputs={
+            Items.MoltenTin: 60.0,
+            Items.Water: 20.0,
+        }
+    )
+    CastBrassIngot = Recipe(
+        name="Cast Brass Ingot",
+        building=Machines.Reformer,
+        outputs={
+            Items.BrassIngot: 50.0,
+            Items.Steam: 15.0
+        },
+        inputs={
+            Items.MoltenBrass: 40.0,
+            Items.Water: 15.0,
+        }
+    )
 
 Recipe.model_rebuild()
\ No newline at end of file
diff --git a/templates/index.html b/templates/index.html
index 23b03dc..faeaac5 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -26,6 +26,8 @@
     code { color: var(--accent); }
     .mono { font-variant-numeric: tabular-nums; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
     .pill { display:inline-block; padding:2px 8px; border-radius: 999px; background:#0b1220; border:1px solid #334155; color: var(--muted); font-size: 12px; }
+    .completed td:not(.done-col) { text-decoration: line-through; color: var(--muted); }
+    .done-col { width: 1%; white-space: nowrap; }
   </style>
 </head>
 <body>
@@ -33,19 +35,39 @@
     <h1>Satisfactory Production Calculator</h1>
     <p>Compute buildings and raw inputs for a target output rate (items per minute).</p>
 
-    <form class="card" method="get">
-      <div class="row">
-        <div>
-          <label for="item">Product</label>
-          <select id="item" name="item" required>
-            {% for it in items %}
-              <option value="{{ it }}" {% if selected_item and it==selected_item %}selected{% endif %}>{{ it }}</option>
+    <form class="card" method="get" id="targets-form">
+      <div>
+        <label>Products</label>
+        <table style="width:100%; border-collapse: collapse;">
+          <thead>
+            <tr>
+              <th style="width:60%">Item</th>
+              <th style="width:30%" class="mono">Rate (items/min)</th>
+              <th style="width:10%"></th>
+            </tr>
+          </thead>
+          <tbody id="targets-rows">
+            {% for row in targets_ui %}
+              <tr class="target-row">
+                <td>
+                  <select name="item_{{ loop.index }}" required>
+                    {% for it in items %}
+                      <option value="{{ it }}" {% if row.item == it %}selected{% endif %}>{{ it }}</option>
+                    {% endfor %}
+                  </select>
+                </td>
+                <td>
+                  <input name="rate_{{ loop.index }}" type="number" step="0.01" min="0" value="{{ row.rate }}" required>
+                </td>
+                <td>
+                  <button type="button" class="pill" onclick="removeRow(this)" title="Remove">✕</button>
+                </td>
+              </tr>
             {% endfor %}
-          </select>
-        </div>
-        <div>
-          <label for="rate">Target rate (items/min)</label>
-          <input id="rate" name="rate" type="number" step="0.01" min="0" value="{{ selected_rate }}" required>
+          </tbody>
+        </table>
+        <div class="mt">
+          <button type="button" onclick="addRow()">Add product</button>
         </div>
       </div>
 
@@ -64,11 +86,12 @@
         {% if result.raw %}
           <table>
             <thead>
-              <tr><th>Item</th><th class="mono">Rate (items/min)</th></tr>
+              <tr><th class="done-col">Done</th><th>Item</th><th class="mono">Rate (items/min)</th></tr>
             </thead>
             <tbody>
               {% for item,rate in result.raw.items() %}
                 <tr>
+                  <td class="done-col"><input type="checkbox" onchange="toggleDone(this)"></td>
                   <td>{{ item }}</td>
                   <td class="mono">{{ '%.2f'|format(rate) }}</td>
                 </tr>
@@ -82,8 +105,11 @@
         {% if overrides_ui and overrides_ui|length > 0 %}
           <h3 class="mt">Recipe overrides</h3>
           <form method="get" class="card" style="background: transparent; border:0; padding:0;">
-            <input type="hidden" name="item" value="{{ selected_item }}">
-            <input type="hidden" name="rate" value="{{ selected_rate }}">
+            {# Preserve all target rows in the recalculation #}
+            {% for row in targets_ui %}
+              <input type="hidden" name="item_{{ loop.index }}" value="{{ row.item }}">
+              <input type="hidden" name="rate_{{ loop.index }}" value="{{ row.rate }}">
+            {% endfor %}
             {% if selected_recipe %}<input type="hidden" name="recipe" value="{{ selected_recipe }}">{% endif %}
             <table>
               <thead>
@@ -120,9 +146,11 @@
           <table>
             <thead>
               <tr>
+                <th class="done-col">Done</th>
                 <th>Output Item</th>
                 <th>Recipe</th>
                 <th>Building</th>
+                <th>Inputs</th>
                 <th class="mono">Target rate</th>
                 <th class="mono">Per-building output</th>
                 <th class="mono">Buildings</th>
@@ -132,9 +160,21 @@
             <tbody>
               {% for s in result.steps %}
                 <tr>
+                  <td class="done-col"><input type="checkbox" onchange="toggleDone(this)"></td>
                   <td>{{ s.item }}</td>
                   <td>{{ s.recipe }}</td>
                   <td>{{ s.building }}</td>
+                  <td>
+                    {% if s.inputs and s.inputs|length > 0 %}
+                      <div>
+                        {% for inp in s.inputs %}
+                          <div>{{ inp.item }} — <span class="mono">{{ '%.2f'|format(inp.rate) }}</span></div>
+                        {% endfor %}
+                      </div>
+                    {% else %}
+                      <span class="pill">None</span>
+                    {% endif %}
+                  </td>
                   <td class="mono">{{ '%.2f'|format(s.target_rate) }}</td>
                   <td class="mono">{{ '%.2f'|format(s.per_building_output) }}</td>
                   <td class="mono">{{ '%.2f'|format(s.buildings_float) }} (~ {{ s.buildings }})</td>
@@ -147,15 +187,36 @@
           <p class="pill">No production steps (target is a raw resource).</p>
         {% endif %}
 
+        <h3 class="mt">Excess products</h3>
+        {% if result.excess and result.excess|length > 0 %}
+          <table>
+            <thead>
+              <tr><th class="done-col">Done</th><th>Item</th><th class="mono">Excess rate (items/min)</th></tr>
+            </thead>
+            <tbody>
+              {% for item,rate in result.excess.items() %}
+                <tr>
+                  <td class="done-col"><input type="checkbox" onchange="toggleDone(this)"></td>
+                  <td>{{ item }}</td>
+                  <td class="mono">{{ '%.2f'|format(rate) }}</td>
+                </tr>
+              {% endfor %}
+            </tbody>
+          </table>
+        {% else %}
+          <p class="pill">No excess products for this target.</p>
+        {% endif %}
+
         <h3 class="mt">Unused byproducts</h3>
         {% if result.unused and result.unused|length > 0 %}
           <table>
             <thead>
-              <tr><th>Item</th><th class="mono">Unused rate (items/min)</th></tr>
+              <tr><th class="done-col">Done</th><th>Item</th><th class="mono">Unused rate (items/min)</th></tr>
             </thead>
             <tbody>
               {% for item,rate in result.unused.items() %}
                 <tr>
+                  <td class="done-col"><input type="checkbox" onchange="toggleDone(this)"></td>
                   <td>{{ item }}</td>
                   <td class="mono">{{ '%.2f'|format(rate) }}</td>
                 </tr>
@@ -170,8 +231,45 @@
   </div>
 
   <script>
-    // Tiny helper to maintain selected item after submit if not handled by server
-    // (we already set it via Jinja, this is just progressive enhancement)
+    // Dynamic add/remove for multiple product targets
+    const itemsList = {{ items | tojson }};
+    function addRow() {
+      const tbody = document.getElementById('targets-rows');
+      const idx = tbody.querySelectorAll('tr').length + 1;
+      const tr = document.createElement('tr');
+      tr.className = 'target-row';
+      const options = itemsList.map(it => `<option value="${it}">${it}</option>`).join('');
+      tr.innerHTML = `
+        <td>
+          <select name="item_${idx}" required>${options}</select>
+        </td>
+        <td>
+          <input name="rate_${idx}" type="number" step="0.01" min="0" value="60.0" required>
+        </td>
+        <td>
+          <button type="button" class="pill" onclick="removeRow(this)" title="Remove">✕</button>
+        </td>`;
+      tbody.appendChild(tr);
+    }
+    function removeRow(btn) {
+      const tr = btn.closest('tr');
+      const tbody = tr && tr.parentElement;
+      if (!tbody) return;
+      tbody.removeChild(tr);
+      // Optionally renumber names to keep indices compact
+      Array.from(tbody.querySelectorAll('tr')).forEach((row, i) => {
+        const idx = i + 1;
+        const sel = row.querySelector('select[name^="item_"]');
+        const rate = row.querySelector('input[name^="rate_"]');
+        if (sel) sel.name = `item_${idx}`;
+        if (rate) rate.name = `rate_${idx}`;
+      });
+    }
+    function toggleDone(cb) {
+      const tr = cb.closest('tr');
+      if (!tr) return;
+      tr.classList.toggle('completed', cb.checked);
+    }
   </script>
 </body>
 </html>