Thanks guys all this info has led to some insight on what prop I should use. When I finally got the Funtana90 running I had changed the prop to a 16 X 4W and it had so much more vertical I can now hover at about 3/4 to 7/8 throttle before it wouldn't even think about it. I haven't had any reliability issues as of yet with the new prop but I'll keep my eyes and ears tuned and watch out for it. Once again thanks for all the input!!!!!!!!!!!!!1