I'm using some of the new hitehc 5475 digitals on 6 volts. These things are amazing. For power on mine I have a Saito 72, and I have a webra 50 that I may be trying out in it. Battery pack is a 5 cell 1450 nimah. I'm using a hitech electron 6 for a receiver. Prop is an APC 13x4w, running w/ 15% nitro. My setup has almost unlimited vertical. I'm balanced at the rear suggested point. I have flap to elevator and spoiler to elevator mixing at about 50%. I don't remember the exact number. Waterfalls are amazingly tight w/ flaps kicked in. Spoilers help stall the wing for high alpha moves, I've found that I've had a hard time to get the wing to stall sometimes, so kicking up the flaps with the elevator for harriers fixed that. I played around with a little elevator->rudder mixing, but found it didn't help much. The pitch coupling in ke wasn't enough that it was worth the mix to take it out. I did chop the tips off the wing though, and ke performance was greatly increased.