I don't understand why you'd want to use the right shift.
I have been trying to fight off a strange habit of mine. My left hand basically doesn't move much and is pretty good at typing, but it seems I barely use more than my index finger when it comes to my right hand. I can still type pretty fast but I gotta back-space relatively often. I'm not sure why I developed like this, maybe because I learned to type fast while playing old games, the first generation of games online, and always had to shift quickly to the mouse, and typing, and back to mouse (no voice chatting back then of course...). It seems that makes the hand more volatile, whereas the left hand always just sits there.