I used to make fishing rods and played around with a lot of different epoxies. If I got a bad shredder I'll just mix up some guide epoxy and inject it into the base.
Sorry to hear that Headley, I read Gray Dog's post about the SHD knot. And he said its was the best $50 he ever spent so it's a real YMMV thing.Worst knot was my recently purchased Maggard’s SHD 22mm (super high density) that I had set in my new Wolf Whiskers handle. Absolutely no backbone and way too soft. Having it replaced now by Rudy Vey.
It might need to be set deeper to have some backbone. As I prefer brushes with a medium/strong backbone and soft tips, a floppy knot won't be something I'll like.