Oh yeah knees....I do a lot of painful exercises and knee bend stretching. Ex bike and walking etc everyday. 30min bike 5 laps up and down the stairs, squats lunges, 2 mile walk and anything else I can fit in. That keeps my knees sore and swollen but have to push to regain lost muscle and knee bend angle. The wound repair after the operation stole my thigh muscles and now they are skinny and weak. It is a long game....maybe 12 months Have a 4th of July American Car show in Timaru so the beast will get a wash and more polish for that. I will take some pics.