I have the exact problem you have over 50 lbs and my MR Kodiak starts to slip.Sounds like we are built the same.I was even going to drive to Montana and see if they can fix it.Looking forward to your pack trials.Is that Kuiu pack waist belt the wrap around type?
Others will correct me if I'm wrong, but I believe Kuiu and Stone Glacier both use a full wrap belt. From what I've heard and read I'd personally take a look at the SG before a Kuiu.
I think the GG Chief that Ed T mentioned is a full wrap as well...correct?
