I have a ZDZ 50 on GP Patty and it hovers at 1/2 throttle. But it weighs in the 17.518 lbs range, with the Smoke in it. It also is running a 22X8 (due to ground clearance) so pretty much, I know I will hover decently well with the 50. Any, I was debating on keeping the 45, but just an hour ago called Horizon for a return authorization number. I think I'll send it back for now, I can always buy anoth when needed.