I sincerely hope that all goes well James. I'm not out to frighten you but my darling wife not that long ago had knee Arthroscopy, a seemingly simple procedure but she picked up a bug and ended up four weeks in hospital and almost died from septic arthritis. She then spent a week in a re-hab. hospital.
Myself, it's bone on bone but my GP advised me not to have knee replacements because of my age, he added anti-inflammatory capsules and whilst walking is still very difficult, I don't have constant pain anymore.
Nothing but heaven itself is better than a friend who is really a friend. - Plautus