[rctruckz]

645's were used alot in large scale gas (such as FG models) a problem some people had was the EPA... default factory settings were set at 100%..if you your steering jammed for whatever reason then it caused the servo to burn-out, a way around this was to set the EPA (End Point Adjustment) to about 90%

Anywayz back onto topic!

I use Multiplex servos (big red things), no probs with them so far & the torque is very nice, can turn my 1/6 FG MB wheels full lock & very quick while stationary :-)