Well I finally finished my first restore. I had a very easy candidate as this brush the knot popped right on out with little effort leaving me a nice handle to work with, and very little work. Just clean it up a bit, and polish it with some Flitz, then get the knot and some epoxy and done.
I went with a 22mm Super Silvertip knot for this restore as I already have some brushes with other knots, and I have to say initially it seems very promising. I kept the knot hole the same size and so it's a little loftier than some might want at about 53-54mm, but the density doesn't seem to suffer at all. Just a new beautiful lucite handled brush I can use and look at!