VMB PSU-06B Truss Adapter Bk

We mount these on our VMB TE-06B stands. They're certainly sturdy and work perfectly well, but they are expensive and they don't "mate" with the VMB stands quick as reassuringly as we might have hoped. They're not doing to come out or anything, but there is a bit of play when the screw is tighten in. We prefer to remove as much play as we can from our truss set up to keep the wobbliness to a minimum. From the photos we thought the square part of the shaft would mate with the square part of the stands ? they're the same manufacture after all ? but that doesn't quite happen. There is a square collar on the VMB stands which look like it should slide up to go round the square part of the shaft of the truss adaptor, but it doesn't quite go far enough up.

I suspect we could have bought a cheaper brand and got the same fit.