Tonight I assembled the mast trunk. It's great to finally start putting something together!
It was a little bit tricky to get everything aligned and square and fixed in place while sliding around on epoxy thickened with silica. I used a bunch of clamps, but just snugged them up enough to bring parts into place without squeezing out all the glue.
In two locations I fixed things in place with my 23-gauge pin nailer and 1" stainless pins. You can just see the tiny holes here. I had removed the plastic tip guard to clear a jam and forgot to reinstall it, so the pins are set a little deep.
And since I had a little left over epoxy, I used that to glue together the puzzle joint joining the two halves of bulkhead 7.