My first giant scale was a 33% Cap 232 with a 3W 70 twin, I had Airtronics nylon geared 75 oz servos on ailerons. Flew that airplane in IMAC for 2 years without problem. Wouldn't do that now though. The Hitec 5645 I tried was slow, developed slop quickly and always had poor centering. It was installed in a .45 size pylon airplane on elevator. Not very much load on it.