We have a Maderite 23 that originally had a nylon knot. This was the hardest knot to get out so far in my limited experience. I cut the knot out of the Lovgren & Daughter brush I won here on B&B. I added 4 or 5 nickels in the base for weight. The other (Everready 100t )was my first restore attempt. Robbed the knot from a Semogue 1460 boar, this is my favorite face lathering brush.