Mark VVwrote a review of RockyMounts DriveShaft Track Locking Thru-Axle Mount on January 23, 2018
Familiarity: I've put it through the wringer
5th and 6th (I bought two) Rockymounts racks I've owned so far and they've all been flawless. With these, the 12mm adapter is a bit hard to fit to the rack but once it's there, it's very much there. THe've been solid so far at (unsafe speed) mph for prolong times on road trips.