So thanks to this thread, I decided to restore my grandfather's old Ever-Ready c40. Getting the old knot out was a pain. I put a small crack in the top of the brush, but not to bad. I am posting to check if I have screwed anything up so far. I have done the following steps 1. Get out old knot, 2. Put epoxy, pennies, epoxy, pennies, ect... untill I liked the heft. 3. Filled in the majority of the center with sawdust and epoxy. 4. Right now I am waiting for it to dry. If this is correct, I will scuff up the tray I made for it (or maybe put one more penny if need be to make the knot sit correctly), and scuff up the bottom of my knot, and put a thin layer of epoxy on the brush, and on the knot, and set it in. Does this sound good? I have a cheap knot to put in, but I don't want to have to drill it out again... Thanks in advance.