I am interested to see how this thread works out.

One of my first brushes was a Parker Silvertip. I love the soft tips of the brush, but it splays too easily and has less backbone than I prefer. It is a wonderful brush for lathering creams and croaps, but is not so good for loading harder soaps. I might try the O-ring trick, but Ultimately, I would like to reset the knot in the faux horn handle.

The only knot I ever reset was an inexpensive VDH pure badger. The brush fell off the counter and the knot popped out when the brush hit the floor. The handle had a metal insert, so I could not change the loft. I used Gorilla Glue (original) as the adhesive. It seemed to work well.