DPowell,
Ran the Quad12 today for the first time!! Didn't know what to expect since it's my first 12th scale. Took a couple of laps to dial in the right amount of steering ( always heard 12th scale had lots of steering - now I know!! ) and then it was awesome! The car handled great - I let another guy at the track who runs 12th try it and he thought it was great too.
I do have one problem though. I was trying to run a 1.67 roll-out. With my 1.9 rear tires and 100 tooth spur I should be using a 29t pinion. It won't fit. There is still room to move the motor screws but the motor is hitting the T-bar. Any suggestions?
I also re-wired my GT7 with 16 guage wire. I removed the diode from the old wires and mounted it to the side of the speedo using one of the supplied clips and wire ties. Seems to work well and doesn't take up near as much room.