Thanks for the feedback. I've received some offline advice from a mechanic about the DT Swiss Carbon braking surface, confirming they are sub-par and to stay away. FWIW it was going to be a clincher that was tubeless ready (which I am interested in running).

To Robert's point about internal nipples, I'd run into similar issues truing for tubeless since I'd have to remove the tires and all the goo inside just to true.