Good idea and would be helpful when making them shorter to reduce weight.
My Panther Building Documentation at <http://pantherbuilder.org/> PantherBuilder Web Site Daniel R. Heath - Lexington, SC I made clamps very similar to yours. Before I split it into two pieces, I tapped the center hole using a 1/4-20 tap, creating ridges that closely matched the spiral sheath. Holds really tight.
