My left knee is bone on bone and my right knee is 70% bad! I'm a 70 year old over weigh Male, due to have left knee replacement on 3 July. Problem is I'm having second thoughts about this. I hope you guys can help me make up my mind. I'm a retired shop teacher. I have both a wood shop and machine shop, that I play in each and everyday, that I am able. Doctor tells me that I would not be able kneel or squat. I do a lot of that and while I have to have something to hold on to get up, (and 8-9 pain) I'm able to do it. Example, I just finished re-roofing my two story home, all by myself. It took me two and a half weeks, and some extra pain meds, but then I had to remove the old shingles and repair some water damage along with replacing all the trim and eves, etc. Okay, ten years ago I could have did it all in 3 or 4 days! Life is kind of rough right now, but with a lot of effort I can do the things I like. if I have to give up my hobbies, then what is the purpose?? I don't care for reading or watching the tube. Restoring a 60 year tractor or buiding a set of cabinets for a family member is what I enjoy doing. Please tell me the things you have found you can't do any more! Thanks for any input you care to offer! I need to let them know next week, if I decide not to do it!