I have a few flights on my new Shoestring. The .61FX/Bisson Pitts/Zinger 12-6 is plenty of engine for this hot rod. In fact, I like to throttle back to about half, switch to low rates and just enjoy the smoothness and manoverability. Then throttle 'er up, back to high rates and HANG ON!

Mine balanced perfectly with the receiver and battery pack behind the servos as per the instructions. No tendency to nose over at all.

Bill