So simple that I can just explain to you right now, which is a good thing, since Maw-Bell might not be in business anymore. (At any rate, their website is gone and their blog hasn't been updated since 2014.)
Modern Elizabethan project posts so far:
Elizabethan Stays - first try
I wasn't happy with my first pair of bodies, which I made using the custom corset pattern generator from the Elizabethan Costuming Page. I'm not saying their pattern generator was bad, just that I should have tested the pattern and altered it substantially before making it up. Still, I made a bunch of useful mistakes on it that I have learned from. This time, I decide to combine the old pattern with online pictures of the Effigy Corset, one of only two extant pairs of bodies from that era!
Blogs I Read