ORIGINAL: OK2Fly
I've got a .55 on a Showtime 50. I've tried a 12x6 and a 13x4. Both props work fine. The 13by is better for 3D stuff. I couldn't get the stock muffler to fit so I slapped on a Bisson pitts muffler.
Nice! I was thinking of the Showtime 50. Got any pics?