....thanks for the tip.
I was under the impression that the Happ I'm interested in was already USB 3 button ready (with wiring) for plugging in.
Do you happen to know if the Bob Roberts one is the same 3 button USB Happ? I just took a quick look on his site...but I can't tell for sure.
Well this is interesting - Basically what you are getting is their 3" trackball combined with their trackball interface kit, but the interface kit is $41.25, and the 3" high lip is on sale for $70, so I guess they're charging an extra $40.00 for the convenience of buying them together.
Bob won't have the USB interface, but that's what the OSCAR board is for. You would still need to run wires from OSCAR's board to your buttons and maybe crimp on some QD's, but for a $30 savings . . .