I current have my 4th & 5th showtime (still have a lot to learn about 3D down on the deck), but I love these things once you take the time to dial them in like a pattern plane. I've used OS108, new OS120, and YS110 on two of them. YS110 seems to be the best. I "had" to use a pitts muf for the 120. May I also suggest using a Hyde soft mount no matter which engine, but especially for the YS110.