I know Im just asking for someone more airfoil learned than I to jump on my face......but dont write off the flat bottomed airfoil (almost said Clark Y) too quickly for performance.My 88" Lazy Ace Bipe will perform all basic aerobatics in a box the size of our field and is neatral when inverted,although I admit it does not tuck under well in outside maneuvers.As far as full size goes.....can you say Bucker Jungmeister?....maybe the best aerobatic bipe of all time?