I use the FS CT6-B to drive my OpenRC Truggy around, but as it's an air transmitter the throttle doesn't self center. This with this piece and a ballpoint spring you can make it self centering. And if you're into electronics, the CT6-B throws away a rediculous amount of power using linear regulators, I removed both of the 5 volt regulators and put a switching regulator in it's place. ( I used a generic lm2596 ebay stepdown convertor) The battery life is much better now. (more than double)