Billy Hell knife
When I say that what I mean is I deducted that if my Knife is pulling to the belly then if I raised both ailerons just a tad it would act like the ele. So in very small increments I would raise both ailrons equally (via my computer radio - I would just adjust the trim on both elevator servos) and try it and then do it again until it flew straight in Knife edge. You have to make minor adjustments to trim your ele but she flies straight now and does a straight knife edge. Did that make sense?