Joy, Are you familiar with this custom cornice company?  I just  installed one of these and it's beautiful. Check out their website, www.rainbowwoods.com. Deb, the owner, is a doll to work with. The sheet I faxed you today on how to measure for a bay installation is from their catalog. All Life's Best, Ellen Cohen - Internor Possibilities

Exceptional quality for design and workmanship.  When we place an order, we are confident that our customers will be completely satisfied. Sincerely, Randy & Renee, Owners of Fahion Interiors, Glenco Minnesota