Just an update on this, I needed a project. I put the bowling nighthawk, cid and I/o board in my Gt cabinet, spliced the trackball and button wires, installed a on-off-on toggle switch on the front connected to the green wire on each power supply so both nighthawk pc's don't both run at the same time. Now all I do is hit the toggle switch and change the hdmi input on my tv and I'm switching from golden tee to silver strike bowling.