FYI, the new (used 19.99 happ golden tee trackball from ebay), optiwiz encoder + cables arrived yesterday.
I took out the happ USB trackball, which I had aready replaced the board once because it went bad.
The results, the new trackball with opti pac encoder is AWESOME! On my first run through marble madness there was no overspin at all and I got further than I ever had on my cabinet with the happ USB trackball. There is 0 overspin when I fired up Golden tee no matter how hard i tried to spin the trackball just long golf shots!
In my experience i'd never buy the usb trackball again. GGG encoder and stock trackball module are the way to go.
**corrected the name** thanks U