Swivel Clamp
Dan Erlewine at FRETS.COM
Dan's Swivel Clamp

I didn't get the best photos of this clamp modification. It's really a long reach "Klemsia" with an innovative little end.

If you look closely, you can see a curved, sandpaper covered, caul on the lower jaw of this clamp. The cool part is that it attaches with a single screw, allowing it to swivel as needed for clamping loose brace ends:

