The first plane I put it on was a Aero-Works .90-1.20 Yak which was the only reasonable priced ARF that I could find in the correct weight range. The canister wouldn't fit and the Pitts requires the motor to be mounted inverted. I had to backset the firewall 1/2" to get the engine on a Hyde mount to fit in the cowl. I don't think I'm buying any more ARFs. I'll build my own to get the size and weight range I want, the color scheme I like, and it will be built stronger and more durable.