My really big brainstorm was the cornerbead, which is a lot like Bob's hardboard corners. It's slightly flexible plastic, in a 1¼" x 1¼" 90° channel. It's tough, easily cut with a rock knife, and an 8 foot stick is a dollar.  I'm now putting 1½" styrofoam all around the piece, and the cornerbead in all the corners, wrapping the piece itself in thin packing foam.  Those guys will destroy their own equipment before they damage another piece of my gear, I hope.

This is suspicions confirmed for me, by the way. All I have to do is mention that I had a piece damaged, and all the guys with businesses crank up this very pithy thread explaining their dozens of extreme attempts and solutions. This is obviously a very large problem for everybody.

Thanks,

Poinz