I fully understand about the carpal tunnel. I have a little bit of it which is bothersome. Really fucks with my guitar playing. Backside of my fingering hand will burn after 5 minutes sometimes. Other nights I can go an hour but I have to rest it up between songs. I'd speculated for many years that the vibes of the bikes had something to do with it along with my daily job behind a computer and all the other impact sports I'd done since a child.
That said, I also have a bike to sell due to medical reasons... a dirt bike with only 4 rides on it. Took a 2 year break and thought I was good enough to get back to it. Apparently not. It's a spine issue, not the hand, but the hand does burn off and on in the 1st hour of the ride.
I don't recall my R1100 bikes being a bother to it except maybe after pushing hard after 12 hours in the saddle. The R1100/1150R is a fine steed and has none of the problems that the R1200 bikes do. These were bulletproof. The R1200 series are definitely not. But they are better bikes when nothing is wrong. If you think HD parts can be expensive...you've never owned a BMW. HD = hundred dollars. BMW = Bring my wallet, cuz you'll need your hundred dollars and your debit and credit cards too.
Buells are difficult to get back once you get rid of them. So maybe wait to sell if you want to try surgery. Good luck.