Thanks. It is a rather routine surgery. They do 4 or 5 every week. But there are ways that it could go wrong. They have to move a nerve out of the way and there is a small chance that they screw it up. Our surgeon said that he has never screwed one up, but there is always a first time. I have my fingers crossed. And I know that nerve because I damaged it in my left hand way back in the 1970's when I first started road riding bicycles. No gloves and cloth handlebar tape and 1500 miles per month on rough pavement does take its toll.