Admittedly, this was one of those “sewing projects from hell.” It wasn’t difficult, I’m just an idiot. Sara, I really hope you find this usable despite… everything.
I followed these instructions first, then ripped out all the seams (twice) and went with this tutorial. ‘Twas the boning that really threw me for a loop. Or, sewing through the boning casing, rather. Anyway.