Ummm...I've only posted a pic of how I layed out my snaps. I just recently assembled a pair of BM Jango armor and vest for a member here. What I found very helpful was taking my tailor's measuring tape (the flimsy kind that is about 3-4 feet long) that I bought at Walmart, using it as a guide to trace the outlines of the armor the width of the tape in from the edge. Then, where the lines intersected in each corner, I put a small black dot with the tip of a sharpie. Scratched up the backs of about 30 snaps that have the metal ring in them. Then began applying 2 drops of Super T glue to each dot, placing the line 20 snaps centered on the dots and shooting them with a quick spray of NCF Quick before moving on to the next one. Once I finished placing each snap, I went back with the Special T and encased the side of each snap with a small wall of glue. The Special T is perfect for this because it will not drip. Then shoot it with some NCF Quick and move on to the next snap.
Once you finish placing all of the snaps, I'd recommend marking a center line on the vest with a pencil, and beginning with the neck armor, begin positioning your armor where you'd like it. I usually put the vest on and look in a big mirror, with an up close printed pic of the real vest and armor right next to the mirror so I can reference it by glancing back and forth. Place the neck piece on your vest, get it where you want it, and outline the corners, top, etc. with the pencil. Then, take the armor and rub some Rn'B on the snaps, carefully reposition it back on your vest while looking in the mirror starting with the top and top corner lines you drew with the pencil. Once you get it in place, press down on your vest so the snaps make contact, and when you lift the armor, you should have small little circles where you need to place the other parts of the snaps.
Keep in mind that for all of the upper body armor, you will not use the concaved heads of the snaps because you're glueing the one piece to the armor. On the vest itself, you will use both sides.
Here are a few pics of how the vest turned out and the back of the armor, etc. Hope this helps.