I'm gonna help a buddy out with his first MAME cab. He found a Golden Tee 99 cab with a decent monitor and bill validator for $400. I thought this was a reasonably good deal. Golden Tee being one of his fav games, this is a good place to start. My plan was to fill the turn right/left and backspin buttons and drill out a Street Fighter (his other fav game) style config on either side of the trackball along with coin and player 1/2 etc. I figure I will need an optipac, ipac and an arcade VGA card along with the buttons and sticks. Anyone have experience filling in button holes and starting new ones? I've had good luck with that plastic wood stuff but never on a hole that large. Anything I'm missing? My trackball is USB, I'm assuming you just cut off the harness and attach the wires to the optipac?