[BAracer]

Used it last night on one of my GT proxy cars. Really interesting learning experience and really makes you think about the mechanics of a slot car drive train.

Right now, I can't imagine not using it on all of my car builds. It's a simple exercise to load up each component onto the test axle and see how it spins. 

Having a balanced drive train has got to be better than un-balanced one, so in this hobby of simple technology, I'll take every marginal gain I'm given.