Anyone hanging a hydration bladder behind the trampoline of a ZPacks Arc Blast?

I haven't tried it, but I think it would defeat the purpose of the trampoline back, and would have your water pressed up against you, possibly uncomfortably. I have to pack mine carefully when I have the bear can in it, or the pack contents round out the pack to the point that the trampoline back is neglible.

At the weights most people are carrying on this site, the question of having the weight further away from your center of gravity is not really an issue. Since we aren't carrying 70 pound packs, who cares?

… but in the space behind my Osprey EXOS 58 mesh trampoline back.

Should work if you make a short cord loop at the top to hook the Camelbak into to support the bladder.

THAT FREES UP A LOT OF SPACE INSIDE THE PACK.

OO! OO! New mod for my pack!

Just tried this with a 2018 Osprey Exos 58.  Seems like it would work as long as you don’t have to pull it out to refill. I’ve got a quick disconnect near the drinking port that I connect to a gravity filter so I can refill it in place.  I also placed it so the hose connection is away from my back I don’t think it would work as well with the older exos due to the  location of the hydration port in the pack.  KInda nice that you can easily see the water level of the bladder, makes space in the pack and brings weight closer to the center of gravity.  Will have to see how it effects back ventilation as thats the big point of this pack in the first place.