It balances perfectly with everything placed as instructed. The OS 1.60 is a great engine and a bargain! Plenty of power for this airplane. I just put another OS 1.60 in my KMP Bearcat and it flies it with authority (15.2 lbs). I'm saving the DA-50 for my new PAU 30% Edge 540 that I just ordered. IMO a DA-50 is extreme overkill for this model. - Mike