Trunnel dyes

In preparation for refastening my boat with trunnels (literally - tree nails), I made some experimental dye sets out of some scrap aluminum I found at work. I bored a 3/8" hole and a hole 1/64" bigger in each plate. You cant see it, but one of the plates is ~3/4" thick and the other is ~3/8". We shall see how well they work as trunnel dyes. I've read that you want your trunnel ~1/1000" bigger to get the right snugness for a good fastening... if need be, I can get access to a fine set of machinist end-mills and make a very precise plate.

But we'll see how these initial ones work for now. Now I just need to find a supplier for the black locust wood...