Clamps and clamping techniques

Recently used a 4-way “Speed Clamp” for a box:


Sorry to HiJack the comments. Love your clamps. I will have to make a set

Actually, the clamps are from Lee Valley/Garrett Wade:

The thing which makes them work is the “speed nuts” which can be canted to slide along the threaded rods, but which catch the thread when straightened — they’re sold separately by Lee Valley for use in fixtures and jigs — I used them in: