Im like you. I have several injuries that limit my abilities to do a majority of things. One of which is shooting comfortably. Its just one of those things. My thoughts are, set up your personal weapon so that it is easiest and most enjoyable to use. Try to keep the basic system the same. God forbid you should lose yours in a battlefield scenario, the familiarity will work in your favor if you have to "pick up" a weapon from the fallen. Were you 1st, 2nd, 3rd Battalion or Rgmt HQ? "RLTW"