I would like to know more about your maple wine. How does it taste? I have thought about doing this, but wonder how I would like it! I'm gathering sap right now to make syrup, and would like to see a recipe to get off on the right foot. I presume you just watered syrup to the gravity you want to start with, to get to a starting point!
I've used sorbate many times, and kept it around till I used it up. Was not awhere that it could get old, but guess I was lucky, as I've never had any issues!