I guess it didn't need the 42 it was almost unlimited with that engine, but you can always throttle down, I think the 25cc would fly it very cub-like, ie less than scale I think the 33 would be perfect if you aren't into heavy aerobatics. This plane would knife edge, flew great invereted with a pretty high AOA rolls etc were no problem whatsoever and yes it would snap, although with snaps I used slow entry no full throttle stuff except for uplines.