Ok, I've managed to figure out how to measure and shorten curved lines on a computer. Still working on a number of other details, such as making the breast cups bigger, based on measurements, and not just by trial and error.
Your version turned out great! I think the button solution might be to try non-elastic loops or even frogs. Frogs are stronger so they might be a good option. I haven't had a chance to try this in my size yet but I really can't wait to play with it more.
Thank you. Perhaps non stretch loops might be solution. I still think for my bust size a busk is the way to go, but perhaps if the buttons were supported with some flat steel boning that might work just as well? If you try it please let me know how you go :)