Tony, I hate to see you have these problems but believe me I can relate. After 3 spinal fusions, and other repairs when he was in there, my pain is getting progressively worse. I can play for about an hour, as long as I'm sitting, before the pain makes me stop. And, similarly, sitting at the computer must be rationed. I am going to see a surgeon at Pres St. Lukes in Chicago next week. This guy has published 300+ papers and hopefully has some ideas.
As you know all too well, people that don't suffer from chronic pain can't have an appreciation of it.
Your description of this forum and, specifically, several of its members reflects my experience perfectly. I hope that I'm capable of hanging around here for a while yet. Every possible good wish to you.
matonanjin (Ron)