Hello all, newbie here, thanks for all of the great info. I've checked the 67 page faq and done other searches, but I haven't found an exact answer to this. I just purchased the imperial 3" trackball from ebay, it came in a box with no instructions. Question one, does anyone know which wires correspond to what mouse button? Question two, how do you mount this thing. It's absolutely huge. Mine came with no mounting plate, I guess my plan is to cut a hole out of the wood in the exact shape of the trackball base, lay the base flush with the wood and secure it with bolts through the plexiglass. That doesn't sound very sturdy to me though and I fear it will crack the plastic eventually. Anybody care to comment on if that will work or not, or please post other alternatives. I have read that the happs mounting plate will work, but I don't see how you can get the ball up high enough unless you cut a huge hole in the board and mount it flush. I sthat how you have to mount it with the happs? Any help or tips would be greatly appreciated.