Personally I like the ys1.10 for this plane. I went with the suggestion of other people in the forum on this one. If left default.. it will hover at 1/4 throttle and has endless verticle. I played with my radio to get more resolution on the hover so the bottom end movement did not move the servo as quickly as the high end. Works great.

The only thing you should watch for is reinforcing the firewall with that big engine with some triangle stock or something to give it more glue area. The warnings have been that be big engines will take the firewall off. (People have also said to reinforce the landing gear, area where the wings screws in, and, use different tail wheel.) I have not done this yet and I guess am just waiting to see if it really happens. If I was not so lazy.. I would take it apart and do this for safety, but, I am lazy. I just make sure I am behind it before I rev it up and only fly at my grandfathers land so I to not cut people heads off... ha.

One nice thing about the ys 1.10 beyond performance is that it is pumped and if you put your tank on the cg you don't have to get a cline regulator. I think that some of the saito's are pumped and I hear that they are easier to tune.. never used one and couldn't speak to that. I had to read up a little to tune the ys as it is different, but, now that I know how.. I would never change. It starts and runs awesome. I love this engine. Never sputters or hesitates.. after break-in has a GREAT low idle. Also.. the four stoke sounds awesome. Really makes a difference in how it feels to fly. Need to play with prop size still.. am being a little hard on the engine with a 16x4w and getting 9700rpms running pretty rich (max should be 9500).

Please note I am a novice, but, have read a lot and flown quite a bit the last 6 months. Can easily do knife edge spin, prop hang, flat spin and a lot of other cool/easy tricks with this combo (Speaking of.. I would like to know if anyone has pulled off a tornado with this plane!!! Can't seem to get it). Some of the experienced pilots may have a different opinion.. dunno.