fitzman163 Very nice pens. I've done a LOT of acrylic & have never used epoxy, just thick CA. The tube should be sanded, then wiped off. And blow out the hole you drilled. I do this on wood also. There's a little sanding dust on both. I hold the blank almost vertical & twist it back/forth real fast installing it. If you hold it more horizontal, you will notice a lot of glue on the outside. Vertical helps more of the glue to stay centered over the hole. Use accelerator or let set for quite awhile. Good luck