Right... monster trucks use them for the forward/reverse transmission.
As far as the shoes go... I think I will just stick with composite for now. Thanx for the advise.
Another thing... and this is really bothering me. Can someone show me a pic of a throttle return spring installed on our car please? I just picked up a new servo for the throttle (my HS-645MG was defective and luckily didn't start really freaking out and opening the throttle till I had ahold of the car) and it is super stiff... I ended up getting the HS-925MG... the super speed, high torque, coreless. It's a nice servo, real fast and is perfect for the throttle, but moving that thing manually is VERY difficlut. I installed an Associated spring from the screw that attaches the carb linkage to one of the center diff mounts and even when I was installing it, I thought that it was super tight and would possibly hinder the servos speed... but no, doesn't work at all! Even with the servo fully open, then turning the power off... the spring does nothing and it is still way stiff by hand to move it back to closed.
What to do here? I really need some help on this.