Sucks man, sorry to hear of any of this. My knees were total shit a few months before the season(horrible pain, Osgood+runners knee+my knee caps not staying in place right(and my leg could go past 180(straight down) way too much)+ a FOURTH thing they couldn't diagnose) and I stopped most of my normal workouts for knee PT time, and I think it made my knees a lot stronger now than lots of peoples are normally, and I'm just glad to be able to ski. Too bad I lost a noticable amount of leg strength though..Good luck!