Hi everyone! I've been checking out these boards for about a month now but this is my first post

My question is: Has anyone here had their seamstress convert a zip-up dress (with covered buttons) to functional, tie-up corset back? I love my dress, but I think the back of my is a little plain and I always wanted a corset one. I know a few designers will actually change the back to a corset if you request it, but mine didn't give that option and I bought the sample anyway. One bridal shop told me they could do it with most dresses and the cost would be around $100 for materials + $100 for labor. This sounds very reasonable to me, but I'm wondering, if anyone has done this, how much did it cost you? How did it turn out? Are you glad you did it?