Biped Robot Leg's 3D Mechanical Design

3D Mechanical Design of Biped Robot Leg (6-DOF, Servo-Based)

I need a complete 3D CAD model (STEP+STL) of a biped robot leg structure with 6 degrees of freedom (3 DOF per leg: hip, knee, ankle). This is for the N2-W emotional interaction biped walking robot project.

Key specs:
- Leg length: 110mm (hip to ankle center), thigh & shank 55mm each
- 6x MG90S servo motors (23×12×27mm), metal gear
- Aluminum 6061-T6 U-bracket structural parts (wall thickness 2mm)
- Hip: ±45° range, knee: 0-120° with mechanical stop, ankle: ±30°
- Foot plate: 80×50×5mm ABS with 4x FSR402 sensor recesses (φ18mm×2mm deep)
- M4 through-hole copper pillar alignment for 8-layer stack
- Left/right leg symmetric (mirror)

Deliverables:
- Full assembly STEP (AP214) + individual part STEP files
- STL files for each part (3D printing ready)
- PDF 2D engineering drawings with dimensions and tolerances (minimum 10 sheets)
- Exploded view with BOM

Skills required: SolidWorks/Fusion 360, mechanical design, servo/robotics experience preferred.

Budget: $250-400 USD
Timeline: 5-7 days

Detailed technical specification document available upon award.