I have this airplane. I Yed my 2 upper servos...keeping the Y in the fusleage, Yed the 2 lower servos then used seperate channels in the radio for upper and lower....Trust me when I say I found my airplane to be exteremly sensitive in ailerons....and extermely nose heavy....get with an expereinced bipe flyer to do your CG use Expo and reduce the throws on ailerons a bit....With that said I have flown mine now for over 3 years