Hello; I have a 4 star 60, and I love it. I fly mine with an old OS 90 4 stroke. I rarely go above 1/2 throttle, and enjoy the way the plane flys close to the stall. I have a big bingo too and now a Spacewalker, and a Bravo too now that I think about it. I have flown my friend 's 4 star 40 wirth a 46 in it. I thought that it didn't have the flight envelope that the 60 has, and had to be going flast all the time.