Thanks for the advice guys. I'm not near the level some of your are at 3D. I just didnt want to buy "weak" servos and have the gears strip or flutter happen. Been there. I'd really like to go with one strong servo on the rudder if at possible. I will definitely use 6 volts, although I've always used 4.8 in the past..... I thought I read on this thread, although I might be wrong. but someone was saying unless you have a very heavy gas engine, leave the servos for the rudder in the glow position, up front under the canopy. Correct me if I'm wrong. Thanks