Thanks for the update Teethgrinder
You know, a few years ago I did a proper job on my wrist, ripped the majority of the ligaments off, dislocated a lunate, broke a scaphoid, trapped a carpel nerve (the very most painful experience of my life when the swelling started and the nerve compressed more and more). Had a 4 hour op and was told I'd be lucky to ever have useable movement in it, may not regain full feeling, that I would be in cast for at least 8 weeks and it would be months and months until I could ride again. On the MTB a wrist injury is a big issue as they do take a real battering.
Within two weeks I was riding trail centres and the hills in the cast:
Within a week of the plaster coming off I was doing this:
I did my physio and have pretty much full movement, and way more than they predicted. No nerve damage. The consultants are to be listened to, of course, but only we personally know our own body. I knew when it felt ok, and when I needed not to be using it. I think, when you do a lot of physical work, you are fine tuned to pick up on signals that desk workers/sofa surfers just don't recognise.
So best of luck with the healing, with riding in the cast, and hope it all works out well! You certainly have my full support and admiration