[WIP] [Self Drafted] First post here. I made a pattern Sewing Machines Parts and Sales in Los Angeles

As the title says, I made a pattern to copy a dress. I needed to add about four inches and ended up adding 7 by mistake. The finished dress needs to come down about a dress size and a half. It’s comprised of 7 panels and has a zipper in the back that I’d really like to avoid replacing. Is there any site or guides you all find useful in this situation? Or perhaps some advice on taking in a dress thats got a fair amount of seams?