I agree with Quint, I have the same setup he has - Saito 72 with CG at 4" (I think I could go back anouther qtr inch to half an inch). My SE has no added weight and does the unlimited vertical thing when asked. I am turning a shaved off, re-balanced 14 x 5 Zinger prop and I have to stick my landings 'cause I have about 3/4 of an inch ground clearance! I have seen other SE with about an inch added on the rudder - I haven't done this yet and mine still can do a pretty respectable knife edge. I'm sure it would help with the hover control. I have three 1/4 scale planes and keep coming back to the SE - I love this plane!