Kev helped Derek find a set of balls!
Thank you. I'm here all week. Tip your waitress.
Sorry, couldn't resist.
Go with 3.1. I think I have 4 installed, but the tail just doesn't hold on that version. With 3.1 though, you MUST get it off the ground quickly or it will tip. Use hte blades I sent you on the first flights.
And yes, that is it.