UDH - Standard or Scam?

[JMY]

That’s almost identical to what I designed and had printed for my latest personal hardtail.
It has been flawless.

Details here:

Egress Bikes - Leftover Tubes Hardtail Build

Thanks! It does consist of a few parts and ideally I’d like it a bit simpler, but I think I’ve pared it down as much as possible to still work with the concept I have in mind. I saw your first (unedited) comment and figured I’d respond to that last bit, but I have a feeling you have already figured it out. The hanger, bolt and washer are standard SRAM parts. The washers you noted are necessary to make up the thickness of the dropout - both are still needed when using a Transmission derailleur. …