I have a Vulfix 404B which is a mixed badger and boar bristle brush. I have fallen out of love with the knot and want to replace it with a badger knot. I do know that many buy this brush just for the handle and re-knot them. Does anyone have experience with re-knotting this brush? What size knot would I need for it to fit properly? What is the process of reknotting it? Who on this board re knots brushes regularly?