Why would you ever want to change it out? To test the loft, use some 3m double sided tape and use the brush a couple times.Thank you fellas. I have the silicone in the photo above as well as 2 part epoxy. Just read a few posts where the epoxy with never allow you to change out the knot, ever!
I have a silicone-fastened knot that is still holding after seven years of near daily use.That's what I use and I have a couple of brushes going on two years with zero issues.