RE: 5-D Flying...
it would be pretty weird though, you would have to have paddles.
Paddles are used for ailerons and elevator for helis, so on an airplane (during a nose down hover) it would act as rudder and elevator. You would also have to put them on a switch so you are not giving cyclic in puts during flight. I dont think it would be too hard to learn bc all you have to do is reverse whatever you need to make it easier.
Adam