Your best bet, is to get the treatments you can while on active, trust me, I have lived and reathed this stuff for years, and the new systems introduced on the outside are far worse than while your in. with that said, if you have not visited the VA yet MSC yet to list conditions etc. then you can list all conditions you suspect/have and after your VA exam your PCM will draft your NARSUM, this is what lists potential unfitting conditions, if they do not list all the conditions you think are unfitting you can appeal the narsum via an IMR (independent medical review) and if that doesnt come back with the additional conditions listed as potentially unfitting, you can attach a memo (btw this adds 2-3 weeks to the process). The memo goes to the PEB board, and is evidence of your complaint, they will review all conditions especially after they recieve the VA ratings. If you do not agree with those ratings, you can appeal for a fromal board or/and a one time review etc.
Now for the bad news, if you are in an MEB, any phase what so ever, you cannot apply for TERRA. Now if you chance it, and don't list much on your VA questionaire, and only go up for the one leg, you may get a fit finding and get to stay in until terra IF IT IS STILL AUTHORIZED AT THAT TIME, it can and does go away frequently, and my AFSC was never authorized it, the three times it appeared in the 17+ years i was in.
If I were to be in your shoes, knowing what I know now, and depending on your situation, I would push for them to find out why your having these issues(like I said chances are it exercise induced compartment syndrome, but Im not a doctor), trying to get those conditions fixed, and at the same time listing every condition i had possible, to get a full and fair examination, that you can use to fight your case for either outcome you so choose. For instance if you want to stay in, it may be that the surgeries would help you and leave you in less pain, so you can do your job, or if they do nothing to help you, you can state as such and fight to get the other stuff as unfitting and go for the 30% or greater. The main thing to remember is, no need to lie or embellish, tell the truth and fight for whichever outcome you want to occur. In todays downsizing Air force however, it may be that every minor conditin is suddenly unfitting and your shown the door as quickly as possible as I have seen things that people had 5 years ago and stay in with not even a med board, all of a sudden being called unfitting and people being booted.