I know the instructions that came with my Kadet Jr that I bought back in the mid 80s actually said to put the rudder on the right stick. The reasoning was that, since any plane I flew after that would most likely have ailerons, it's better to get used to turning using the right stick since most of the time you're doing aileron turns anyway. Not sure I totally agree with it but, then again, the plane was designed as a three channel trainer