I haven't been around these parts in a while, but I have noticed that people are still using this reference for their builds, and I have been getting some PMs.
I got busy and never got around to finishing what I was going to on the Ab Plate and Forearm modifications. I don't have any pictures but hopefully a small explaination will suffice.
From what I remember, I measured the forearms on her arms and figured out the right place to cut and actually shortened them first. After that I removed quite a bit of material from the inside pieces where the butt joint is formed. I recommend doing this little by little so you dont cuttoff too much. Also, I left a bit extra to recreate the return edge. The return edge was the hardest part and necessary to create a flat spot for where the outside strips would adhere the two. I actually really screwed up most of the return, but as it is being hidden by the strip, it doesnt really matter too much. I used a metal ruler and a heat gun to get the bend. Once that was done, I glued everything into place and it was ready to go.
For the ab plate, I basically measured the max amount that I'd be able to cut from the plate without causing any issues or making it look stupid. This turned out to be about 1.5 inches IIRC. Once measured I used a blade to cut the cod plate from the ab plate. I made my measurement along the line where I had cut on the cod and cut the 1.5 inch strip of excess off. Once this was done, I had to reattach the plates. I used a but joint and joined them in the back using plenty of extra plastic and tons of crazy glue. I also used canvas tape and crazy glue to form a sort of ghetto fiberglass. The plastic really does most of the supporting of both pieces.
That's pretty much it. I know this is very late, but I'm not really around here anymore and I've gotten into other hobbies besides costuming. Good luck on all your builds if you are reading this as a resource.