RE: Rudder inputs on belly-side knife edge.
CrazyHerb,
The way I remember it in knife edge is if I am looking at the belly my rudder stick goes in the direction the nose is pointing. When I'm looking at the top of the plane the rudder stick goes towards the tail. From Inverted rolling to upright the rudder stick goes in the same direction as ailerons and if rolling from upright to inverted the rudder stick goes in the opposite direction. That has helped me alot along with lots of practice on the sim.