I bailed on the 469/669/659 project. It was going to be a 659 slide on a 469 with a few 669 parts thrown in, but the feel of the 2nd gen double-stack compact in my hand just isnt right. This meant significant cutting of the grip frame, and then an expensive refinish. In the end I sold the parts on ebay, kept the frame for a “maybe” project down the road. Smith and Wesson really scored with the 6906! Got everything right.