I have a Futaba 9CAP super and there are some pattern guys at my field who are mixing for a straight knife edge. I understand that this corrects tendancies in the model when you do this but would I want to mix the rudder with elevator and possibly aileron for a straight knife edge if I do 3D? It seems that I would want all my surfaces totally independant of one another so if i am in a hover or something and I need a little rudde I dont get elevator and aileron also. Am I right or should I do a mix because it would be nice to have a knife edge that doesn't pull to the wheels (on my plane). I just dont want to do it if it will effect 3d'ing. Is it possible to put the mix on a switch so i can turn the mix on when i knife edge and turn it off otherwise?