It is some time since I gave an update to anyone who is interested - is anyone interested?
The surgery I had at the start of September failed - my bone moved again and was not repairing correctly. So, 10 days ago, I returned for a more intensive surgery. The preparation was pretty similar except, I got to meet my surgeon this time and talk through what he was planning to do.
Today, I returned for a check up and I was relieved to learn it is now recovering as expected. I have three stages of recovery - flexibility, strength and endurance. For the kind of things that most people do with their least dominant arm, I will get flexibility and strength back in a couple of months. But the level of endurance I need for 3 hours of climbing could take up to a year. The good news is that he believes it is possible and is not writing me off due to my age.
I also got to see a xray of the work they did. It looks brutal (but I still took a copy because I am like that). I have a network of metalwork in my arm with 6 screw and a plate of metal.
As for my diabetes, it has been struggling with the lack of exercise so, until the weekend, I was needing 60% extra basal but that has now been nudged down and I plan to return to the gym this week although I might leave the weights for now.