Reservoir with Roller R1

Create a new parametric CAD model from zero. Units: mm. IMPORTANT OUTPUT REQUIREMENTS Return a valid precision-model object with: title param_schema script The script MUST define a top-level function exactly named: build(params) Create all CAD geometry inside build(params). Do not place executable CAD operations outside build(params). BUILD ORDER Follow this exact order: 1. create outer reservoir 2. subtract inner cavity 3. subtract upper slot 4. subtract lower slot with internal tapered guide 5. keep this resulting reservoir unchanged 6. create R1 as a separate second solid 7. return exactly these two solids Do NOT rebuild or replace the reservoir after step 4. RESERVOIR Create the outer solid by extruding along X from 0 to 120 this closed YZ profile: (0,0) (20,0) (22,100) (70,180) (0,180) Subtract this internal cavity: X = 3 to 117 Inner YZ profile: (3,4) (17.08,4) (19,100) (67,180) (3,180) Reservoir final external bounding box must remain: X = 120 Y = 70 maximum Z = 180 Top open. UPPER SLOT Cut through front wall Y=0 to Y=3. Width = 103 Height = 3.8 Center X = 60 Center Z = 148 Rounded end radius = 1.9 LOWER SLOT External opening at Y=0: Width = 103 Height = 3.8 Center X = 60 Center Z = 132 Rounded end radius = 1.9 Internal opening at Y=3: Width = 106 Height = 6.8 Center X = 60 Center Z = 132 Rounded end radius = 3.4 Create one smooth tapered transition through the 3 mm front wall between these two openings. The external lower-slot opening must remain exactly 103 x 3.8. ROLLER R1 Only after the reservoir and both slots are complete, create R1. R1 must be a separate solid. Axis parallel to X. Outer diameter = 8 Length = 106 Axial through-bore diameter = 3.4 Position: X = 7 to 113 Center X = 60 Axis Y = 10.14 Axis Z = 14 Do not merge or intersect R1 with the reservoir. FINAL VALIDATION The final CAD model MUST contain exactly 2 solid bodies: Solid 1 = reservoir Solid 2 = R1 Solid 1 MUST still contain: - external bounding box 120 x 70 x 180 - open top - upper slot 103 x 3.8 at Z=148 - lower external slot 103 x 3.8 at Z=132 - lower internal opening 106 x 6.8 at Y=3 Solid 2 MUST be: - diameter 8 - length 106 - through-bore diameter 3.4 - axis Y=10.14 - axis Z=14 Do not add: supports snap-fit shafts R2 motor bearings divider extra cavities extra rollers extra features. Do not omit, replace or reinterpret any specified feature.

Parameters

Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.