When learning to hover, I'd have problems with rudder when the bottom of the fuse was toward me. I used a mental trick to help learn the proper rudder input when the fuse bottom faced me. I'd think about pushing up the low wing with the rudder stick when the bottom faced me. This is very similar to the mental suggestion Fly4Fun2 had. After a while you stop thinking about it and it just happens.

As for rudders and warbirds, I'd say it is OK to turn the rudder off. I really like to watch crasher tapes.