Gary, congratulation for your knife spin,,, with others planes i can do but with UCD it´s impossible for me,, Can you tell me what configuration do you have?????? (cg-elevators-ailerons-rudder).....
Now, with .90 i can do better knife flight maybe because the weight because i do at low velocity. With .46 it´s very difficult to do knife, when i do, it´s like a butterfly...(now i said that.....[&:]).

Sergio