The knuckle to be replaced.
The hype is real. Always wanted one, but SRAM already is a direct mount so now that I finally have Shimano (on the Dogma) the first modification I ordered was a direct mount rear derailleur hanger from Framesandgear. Sadly, it never got to me so I reached out to them and it turns out the package was returned. Kristoffer at Framesandgear was a champ about it though and resent the parcel with FedEx and it got to me in 2 days.
Fitting was super easy and I can 100% confirm improved shifting (it’s lighter too!). Very happy, what a great little product.