I've got a Airtronics 94358 for steering and a JR 590 for throttle. Just be sure you cut down the spring on the throttle linkage. As it is it's much too long and will over strain the servo when braking. You should be able to pull he carb slide slightly when applying brakes.
Bryson, that must be a tight as hell engine you've got in your NTC3. I can get this to turn over my brand new STS .21team, and it's as tight as a nuns nasty.