Hi NH
I almost posted a disclaimer in my original messaage that I am not associated with Sanborn Mills. I just visited the mill while on a visit to my mothers in Gilmanton, and I wanted to help get the word out that they are up and running.
I would enjoy seeing a thorough discussion of water powered mills in this forum, but the best I can do to answer your questions is direct you to Sanborn Mills website or to the Society for the Preservation of Old Mills at
www.spoom.org Jim