It seems to be a well built plane and comes with retracts and a real big spinner for a 40. I have one that I started and stopped working on when I screwed up the wood mount trying to fit a 4 stroke 91 in it. I can fix that easy enough and will shoehorn the 91 in because I don't think a 61 4-stroke will be enough for this plane and it just wouldn't sound right with a 2-stroke. I fly off of grass so I think I'll replace the supplied retracts also but other than that as I said it seems to be well built and the covering is real nice on it and for a mustang you didn't have to build for under 200.00 I think it's well worth it.