I finally decided that I would try to restore my Duke 2 myself. I steamed out the old knot, but ran into a couple of problems. There is a small hairline crack at the edge of the opening and some gaps in the plastic/ceramic or whatever where some came out with the knot. You can see both in the photos. I'm guessing that my best bet is to patch those gaps and fill the crack as best I can. Should I use clear epoxy? Is something else better for this purpose?