On the new setup I'm working on, I was hoping to try the craft push pins, with the metal pinch clip on the other side (not sure of the exact name for those). Wondering how well they will hold up the weight of fiberglass armor, but I have a bunch of them. They would elimate some of the work if all you have to do is push the pins through the fabric, and it would also allow for ease in upgrading or changing armor while keeping the vest intact. Don't know if this will work or not, but I'll be trying it soon.
that's an interesting idea... wouldn't the backers for those pins be sort of uncomfortable though?