It's not possible for ME.... but Len does it all the time. A result of experimenting, tinkering, necessity and dedicated practice. You have to realize, when Len's shop is in the height of their season they do a LOT, I mean a LOT of bows. You got to be good. They do it right the first time and can't wait around for the owner to come in to start setting it up and tuning if the owner wants him to tune.