Hank Hill
I think you will need a medical opinion to say that due to SC condition you fell and this resulted in injury to healthy leg. I think you need some kind of medical rational to show that weakened leg contributed to your fall or that your NSC leg was weakened by having to bear the burden for both legs. This is just my opinion. You want medical evidence to make your case and not rely on VA to do the right thing otherwise the VA will say " there is no evidence of in service injury blah, blah, blah."