Arcade Trackball, 3"

This is an arcade trackball. You can print most of it, but you will also need steel rollers, a ball, and electronics (details folllow).

I've included holes in the bottom for mounting screws to attach an LED board to shine through the ball if you have a transparent/translucent ball. (For example: https://groovygamegear.com/webstore/index.php?main_page=product_info&cPath=74&products_id=273)

If you plan to mount this under a wooden panel and like a decent amount of ball exposed, you don't need to print the top half.

When printing, bear in mind the the mounting for the optical boards is based on my own circuit board design (attached zip file). If you use a purchased board or custom, this bit needs to be modified.

For the optical board, you will need:
* 1 x 100 Ω
* 2 x 4.6k Ω
* 2 x EE-SX1041
* 1 x SN74LS14N
* 4-pin connector, 0.1" spacing

I have printed and tested (see pic above) the bottom portion, but have yet to print and test the top (I don't have a need for it, as I plan to und