re: golden tee, shuffleboard, bowling
Pardon my ignorance, but what is different about these games that I might hit the 'upper level?'
Take a look at my cabinet. See it's shelf. People stub their fingers on that. I plan on modifying it sometime.
And my shelf is thinner and about as close as yours.
As a follow-up for anyone considering a 2-tier arrangement like mine, I played a few bowling and golf games after reading this thread. It's true, the shelf is a bit in the way for those games where you need to give the trackball a really fast, straight roll.
That said this is not a big problem for me because:
1) The games most often played on my cab are 80's classics that are not affected by the shelf.
2) IF you are aware of the risk of smashing your fingers you can pretty easily use your palm and push up on the ball rather than straight.
If you are building a cab because you can't wait to play hours of bowling and golf games, consider another design!
Dave
{edited for spelling.}