So, I have used most synthetic brushes and for the most part, they all perform pretty good. The newest knot I have tried is the silksmoke and i prefer it to the tuxedo and plissoft and maybe even all black boss knot. I've tried the timberwolf knot which may be what they call a boss knot. my favorite so far is the silksmoke knot and I also like the synthetic horse hair knot. 2 knots I have not tried are the cashmere and synbad. anyone on here have any experiences with any of these knots in the 24-30mm knot size? which one is softer, has more backbone? is one superior to the other? I am eyeing either a 30mm cashmere or 30mm synbad brush. Don't know which one to pick.