thanks guys, but nope, not a drivesaver or a pyi. or at least nothing they currently offer looks anything like this coupling. I've used the drivesavers before - they are just plastic blocks that sit between the two mating faces... and the pyi ones are similar but have an offset bolting pattern with stainless backing plates
In the pic of mine above, you can see that it has two face flanges - one on the output of the gearbox
and one on the shaft end, which are thrubolted together, through black elastomer elements with a full diameter, steel
, center element.