The difference with SES brand clamps was that the flat area on either side of the wormgear was a little wider. Also I'm not sure if they were stainless steel or zinc plated. I remember having sold some many years ago that were hard to turn due to white oxidization, seems this could be a nice way to keep them tight by design.
I've always thought tack welding the tops and bottoms of the mount saddles to the bike's frame would be best, more permanent and all, but I bow to the millions upon millions of miles ridden with clamps only.