Started the day with some slight changes to yesterday's Prometheus code. I now code best when I work on something one day until it works, then overnight think how it can be made more efficient, and make those changes. There were a few 'near bugs' that I fixed. When compressing time on notes, say a sequence CDE, squashed so that notes are on top of each other, the last note should be the one that remains, the others automatically deleted. There is also a lot of complexity regarding parameter changes, but all should now work.
Then, back to the easel head, lots of wood work. Here you can see the nearly finished article:
That is a test bolt, it will have a plastic handle on (when the one I've ordered arrives).
Those holes are for 6mm bolts to hold the head.
Here you can see the sloping scalene grip, so that it will fit a variety of painting surface sizes but still resist when pushed. The old head had no back at all. It did have a slot for 3mm board, but even that would wobble as it was a fixed rectangular slot, and it would grip and hide at least 5mm of the top, marking the surface and making the slot liable to become dirty. I may be able to make a specific head for miniatures, which might be useful.