I'm using the Thunder Power 1320. Getting 10+ minute flight times, but hard to accurately measure since a lot of that time is spent landing hard to avoid (or reduce) disaster. [:-] I know, I need to just punch it up in the air to eliminate the ground effect, but it's fall now, and where I live that means it's almost always breezy. But the next calm day it's going to be in the air, no matter how many parts it costs! [&:]