I've been using a Stone Glacier Evo 3300 for about 4 years now. It has held up well. I've carried up to 55kg at least loaded up - that's the heaviest load I've actually weighed. Nothing feels right at that kind of weight - I reckon about 40kg is the max I can do for the body to feel OK regardless of the pack. The SG is comfortable enough to carry if set up right, up to maybe 35kg. It's definitely the most comfortable pack to carry weight that I've ever used.
It's only 57L I think, but I can fit gear for 6 nights 3-season trips in the pack body. I have used the expandable load shelf before for overflow food.
I selected this particular model as it has the least complicated design I could find of all the load shelf type packs.
Loaded up with half a yearling red on the shelf & all my gear for a 6 night trip (minus half the food)
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