Hi everyone, first post here. Just bought a Zpacks Arc Haul to replace my Osprey Exos and I’m looking for advice on how best to add a couple of modifcations to the pack. I’d like to get into MYOG gear eventually, but I’m leaving for the GET in a month and have a million other things to do, no time to research sewing machines and fabrics, learn everything I need to do a quality job. I was thinking of taking it to a local tailor instead. Here’s what I’d like to do…
Mod 1 – My Exos had these small elastic pockets on the shoulder straps where I carried my gopro/grip. The Arc Haul doesn’t have these, but I NEED one, haha. Here’s a couple of pics that show the Exos’ shoulder strap pocket and my gopro carry setup:

All of the shoulder strap pockets that I could find to buy online (ula, zpacks, gossamer gear, HMG, MLD, zimmerbuilt etc etc etc…) are just a floppy pocket strapped on to the shoulder strap. This will not do, I need to firmly hold the gopro in place. Not just because I don’t want it to fall out, but because with it held firmly in place it can be used to film hands free if the situation calls for it. I’d to add a similar elastic pocket to my Arc Haul shoulder straps. Any suggestions for materials to build it?
Mod 2 – I’m finding it impossible to access water bottles in the side pockets of the Arc Haul without taking the pack off. I can’t even touch the bottles when reaching back for them with the pack on. The side pockets of the Exos were designed so that you can insert/remove a water bottle from the “side” of the side pocket in addition to the top:
I’d like to modify the side pocket of the Arc to have a side entrance like the Exos. I’m thinking the pocket will need to be completely redone in order to have a functional elastic cuff around the side opening. Additionally, the Arc’s side pockets are pretty small… With the Exos, I could fit two wide gatorade bottles in each side, but the Arc Haul only BARELY fits two smart water bottles, or ONE Gatorade bottle per side and just BARELY with a full pack. I don’t want my water carrying containers to be limited to one specific shape just because of my backpack’s side pockets. So if the pocket is going to be completely redone, might as well make them a bit larger while I’m at it. If the entire side pocket is to be redone, there goes the seam seals inside the pack, and would need to have those redone. I was thinking I could just buy the gridstop (what type to match my Arc?), the seam tape (where/what exactly is it called?), and the elastic for the openings (again, what type/name?) and have the local tailor do it. Thoughts on this, suggestions?

