Biggest problem with the SE and knife edge is its profile. Mine's got an inch added to the rudder, 3/4's added to the elevator and the elevator's modified to allow 45+ degrees throw on the rudder, AUW of 4lbs 10oz with an Irvine 53, last time I flew it the cg was at 4 3/4". It knife edges, and it will climb in knife edge (won't ke loop) but it takes full throttle and a load of rudder. It pulls pretty hard to the belly and when I input up elevator to correct that causes it to roll to the right which is correctable with ailerons. It'll do laps in ke, but that's about its limit. Gonna try changing the fuse profile (been wanting to do that since Christmas, boy this winter stinks) and see if I can improve the ke and get rid of the coupling.

Mike