Thank you both for the recommendations. I'm going to ponder my options some more on the Han snap. I'm leaning towards removing part of the return edge first before cutting more off or re-drilling the snap.
In the meantime, I worked on the V-tabs this week. I made the cuts for the pieces. I went with close to 3"x1" pieces. I made three of them so I could afford to mess up on one. I made the cuts and then did the heat bends to first make the "U" shape.
After the U shapes were made, I then used heat to bend the V portion. I messed up the first tab by bending too much, but I learned and was able to make the v portion better on the second attempt.
I painted the inside of the V black and then used E-6000 to mount them to the inside of the posterior plate. I was careful with clamping this time!
Next, I will do a partial kit up to check the 3 dressing issues that I had: Calf alignment, posterior plate alignment, and positioning of the thin white elastic that holds down the shoulder straps. Pics coming for those with questions. I'll come back to the Han snap after these are done.