G'day Mate
We have conversed already, I hope the Western Breach works out for you, it is a great climb, but here is my experience of diabetes and the mountains.
I guided a insulin dependent client once in the Chimanimani Mountains of Zimbabwe. It was a long and fairly punishing climb, and he was fine throughout, but had an episode on his return and suggested that it had been a bit too strong.
I also had the pleasure of climbing Kili over the new year with a young polish guy who was insulin dependent and he had no problem at all. His name is Oskar and his email address is
oskar.tetzlaff@googlemail.comI am sure he will ease your mind