[Crazyboy]

We have them on 1334's 6-wheel chassis, they work pretty well, no issues. The team I was on last year used Supershifters, and they also worked pretty well with a 4-wheel drivetrain. Benefit of the Supershifters is that they *can* use servos, we had some success with them, you just have to be super careful in terms of programming/building so they don't break. To be honest though, I'd have to give the edge to the Supershifters in terms of ease of assembly.