I had a Evotech mount from a different bike and made it fit my GS but wasn’t happy. I ordered the proper mount for my bike and it was exactly the same but should be mounted on the upper mount backwards which looks odd and was not shown on their photos. I’ll have to put up with it but am not happy.
good product, purchased 2.
Only problem is that the screws that **** into the holder for the Quadlock **** into small brass inserts which pull out easily when tightening. I ended up drilling the brass inserts out and drilling right through so that It could be clamped on with a longer bolt and nut.