game controller 3d model

Ergonomic game controller shell based on the reference image. The model must be designed for 3D printing and split into two parts: top shell and bottom shell. The interior should be hollow with 2.5 mm wall thickness. Include internal screw posts for M3 screws to connect the top and bottom shells. Add circular holes for two analog joysticks (22 mm diameter) and four face buttons (10 mm diameter each). Include a D-pad cross opening on the left side and small holes for start and select buttons. Add a rectangular cutout on the top center for a small OLED or TFT display (approx 30 mm × 15 mm). Include internal mounts for PCB and battery slot (18650 battery). Smooth ergonomic curved grips on both sides. Ensure rounded edges, proper symmetry, and clean topology suitable for STL export and 3D printing.