More upgrades to the table

To address the bend in the table, I added another 75 by 25 mm truss that runs lengthwise under the middle of the table, and two more legs so that the X-axis doesn't span as far. The dip is gone, and the table is stiffer.

I've also added a jig for holding the wood in place while dovetailing it.

The two auto-adjust clamps don't need to be adjusted for different thickness of wood, and do an excellent job of keeping the wood in place. The clamp on the right is attached to the new truss that runs lengthwise under the middle of the table. It's also a lot easier to line up the vertical piece with the horizontal piece with the jig, because locking in in place is just a matter of closing the clamp.

The one unexpected surprise was that clamps will push the extrusion that the wood is centered on. I fixed this by attaching it to the new truss.