drumbum: i've seen your posts in other threads so i'll ask you, i have the yak and f90(which i'm selling) but i got a 91fx i want to put in something, is the ucando a good home for it? i was looking at the thread on that mattchapman 580, the 91 would be alot for that, which is fine by me, but some of those guys are saying the surfaces aren't quite big enough for true 3d flying, i'm running out of choices in this size range, whats your opinion for someone in my situation? anybody else can let me know what ya think too, i want some feedback before i purchase something, keep in mind, i fly at 5000', so i won't get the same power you guys below would