Mechanical Design
Battery Placement
In deciding how to place the battery, we considered how its placement would affect the mouse's center of mass and thus its ability to move quickly and turn efficiently. We ended up sticking to a similar design as was given to us in the practice mouse, though we did have to redesign due to our mouse being slightly different dimensions from the practice mouse. Placing the battery under the PCB, while placing the center of mass of the mouse closer to the PCB, interferes too much with the wheels and the motors. The final battery holder design held the batteries successfully above the PCB and secured the motors to the board, not interfering with their function at all.
Wheels
We chose wheels designed to work with similarly-sized Pololu motors, with a diameter of 32mm. They secured extremely well to the motors, ensuring the motors didn't slip in the wheels at all. Their overall size (diameter) left something to be desired, but the next size up was significantly larger than these and would have posed more problems.
Isometric View of Clarence
Overall, we were satisfied with the final build of our mouse. We attempted to stick two googly eyes on the battery holder during final testing, but only one seemed to stick. Thus was named our mouse: Clarence, the Cyclops.