RE: H9 Cub Engine choice
I'm going to try my OS .52 Surpass mounted inverted. Moving the engine mount was a pain but well worth it im my book. It is so much better with at 4 stroke muffler sticking down and out the cowl. Moving the throttle line is easy. But then tearing out the tank mount system was a pain, but necessary to get the center of the tank equal to the carburator. Hey, RC is not easy; would you rather do cross word puzzles or pay golf???[:'(]