hi! i got recced y'all's binders for being the most successful at flattening Large Chests &fitting fat folks. i've gone thru y'all's plus size tag, but i just wanna check - i'm an L cup, so 12 inch difference between bust and ribs. i'm also petite, despite being 'overweight.' ...will it still work for me? and if so, what should i shoot for when ordering/how do i order specifications? bonus Q: does the zipper under the arm get annoying at all?