Well, it sounds like Simon's issue is "structural", much better (I would think) in terms of healing than Winston's nerve damage problems.
And thank you for your kind words....yes, at least I know I did everything possible for my Winnie...sounds like you're doing the same for your Simon.
Maybe the vet could try a little "kitty valium" when working on Simon...that made things so much less stressful for Winston.

All paws crossed for Simon.....