Michael,
I think at one time or another I had every turkey vest they made. They have plenty of pockets some with 20. Problem for me was remembering what call was where, and which pocket. Fumbling with zippers etc. They also don't hold up well(game pouch falls apart) after toting a few turkeys out of the woods.
One of the best things I did was quit using one and went to a haversack. Slate and glass calls go into leather pouches, and box call in a leather holster. Bottle of water a few mouth calls, pruners, snack, turkey wing etc. and a wing bone around my neck
When you need something open the flap and everything is right there.