Is it possible that driving a Speedster has caused some knees to go out??! I had my right knee replaced August 20 so I'm a little over 3 months out. Good luck to you both, Robert and Bruce! My knee is now perfect in every way---exactly like the original knee but without any pain at all. Looking back on the process I wish I had known how it was going to go, especially that in about 3-4 weeks the pain would greatly subside and at 2-3 months it would be feeling great and I'd be walking completely normally. At the one month mark I felt like I'd be limping, swollen, hurting, and on a cane forever and it was hard to realize that my knee would be just great before very long.
If I ever had to have my other knee replaced I'd feel a lot more confident knowing that yes, there is an end to the recovery. I am hopeful though, that the amount of cartilage in there will last as long as I need it.