Bogydave says birch keeps him plenty warm. Stay with it and you'll get back to the 3 years soon. I really did want to get most of the ash cut this winter.
Six last year. Got five put up in the barn for this winter, denser stuff tho. That black birch is my favorite
Being ahead is being ahead. You can always make up and be further ahead than where you want to be. Your good to go for this season, peace of mind in itself.