Looking to put a revolution x board in my T2 figured this would save me from opening the game up everytime I want to swtich it up. I see tha jammaboards discontinued there two in one.
http://forums.arcade-museum.com/showthread.php?t=119614 been discussed a bunch in that thread and a few others. The general consensus seems to be that Clay Cowgill's stuff is really good, but you pay for what you're getting. If you're just looking to switch 2 and you don't mind paying a bit for it, that's probably the best route. That said, if you've the time to mod the board for -5 and service switch if they're needed for those two, I think djdns still has one of the 6-1's for sale.