Sounds great! I have been hearing the same about blueberry leaves - old Native American remedy.
When I lived in Nor. Cali, we had a few loquat trees in our courtyard of our apartment building, first time I had ever had loquats - no one had been eating them (except the humming birds) so we got all this free fruit. I wasn't diabetic than though (as far as I know - I could have been) - never heard that about the leaves though.
Vinegar seems to work for me. I make vinegared cucumbers and they seem to help if eat them with a meal it seems like. But I don't go as high as you unless I have way too many carbs or a drink or something.:)