What brand would you try next when an Exo k4 doesn’t work?

[guitarpreston]

You should see what I can do with those “find 5 differences in these pictures” games
Glad it worked out!

 

[Green-Up]

Nice! I'm glad it worked.

 

[hammer0419]

For me, the answer is/was the Hill People Gear Decker frame. I still use Exo K4 bags on the Decker frame.

HPG has aluminum stays that you bend to custom fit to your back shape, aka zero slippage.
HPG has delta straps(thanks Patrick Smith) that pull the lower third of the load into your lumbar. This eliminates the feeling of any weight pulling away from you. It also unloads the weight from your shoulder straps.
HPG’s shoulder harness is the most comfortable design I’ve found. Even though it’s essentially there just to stabilize the load while your hips & lumbar carry the load.

Aluminum Stays are 1000% the answer!! This huge fascination with saving a few ounces is nothing more than BULLSHIT..... WHEN IT COMES TO PACK FITMENT!!!
Buy a pack that fits ok and is 3oz lighter. Than a pack that can be fit to PERFECTION (ALUMINUM) and weight 3oz more.
If you have such a hard on to save a few ounces. Lose those ounces somewhere other than you pack!!!!