It would be nice to also have some slots for folding hex/torx key sets. I carry 3 different sets. I'm talking about the sets that have multipul allen wrenchs or torx in one set and fold out.
I would do it like a chef knife roll I used to use when I was still in the kitchen on a daily basis. long top flap total dimension 18" tall" 24" long: with the flap able to fold over about 8" snaps for the top flap, on the inner of the pouch. buckles to hold the roll in place. and a handle for carrying.
tools and stuff can get heavy and akward to handle in a rollup i really like the look of this design and its not far off from what you guys already have