I am at 6800 feet where I fly, so there is less drag on the prop, which means a given prop up here will pull less watts than at sealevel, as I am only getting about 1100 watts out of a 17X8 APC-E, and higher pitch props deeply affect 3D ability and larger diameter props fly the plane too slow (this is with a 6S pack - would probably do better on 7S but would mean more $ in a new ESC and packs for me). I had it in a 7.2 pound Edge and it was enough for constant speed unlimited vertical and would hover and pull out, but wasn't impressive. I flew this same setup at a lower elevation of 2500 feet and it was what I would consider satisfactory, in that the pull out of a hover was almost accelerated. I am sure it will be enough for the Showtime 50 at sealevel, but up here for the best prop I have found (17X8E), I think the 6.2 pound Inspire was a better choice for me.