[Above] And here’s me forgetting to photograph steps, but it’s OK. Advance the threaded rod a few inches. Put the jaw half with the through-hole on the bar and with the rod through it. Put a washer on the rod and into the well you drilled. Glue the nut on the end of the threaded rod. Now you should have what is shwn in the top photo. 2nd photo: put the other washer in the well of he other jaw half. Apply wood glue to the inner surface of the jaw. 3rd photo: clamp the two halves together. You could put a few of those pesky plastic cards between the bar and the ‘fingers’ to keep glue off of them. You might also want to rotate the rod a few times until the wood glue sets up in case it squished inwards. The washers keep the nut from digging into the wood of the jaw. So far I haven’t had problems with my clamps regarding this.
-- Ni faru ion el ligno!