I was also wondering how this turned out & how he liked the Ibera panners.
I ended up with Axiom Monsoons
https://www.modernbike.com/axiom-mon...iers-red-black
While I haven't had the chance to really load them down our do anything other than some day trips, I did bounce them across 12+ miles of fairly rough and frozen forest service gravel road. In fact I was more worried about the bike than the panniers but they didn't move. Mounting system seemed very secure.