Not much has been said by those using 2 strokes like the Irvine .53 , OS 50 SX, the .61's etc. I'd really like to hear from them.
I have a cheap TH .61 engine in there and it works great. Hovers at 1/2 throttle and pulls out good. Unlimied vertical!! Only $89 from
www.towerhobbies.com
TTYL,
Andrew T.