Here are the added stringers to the back two sections. I will be putting a 2" piece of ply on the top so it will be easier to glue the floor down.
Finally got F18 in place and cut the slot for the sprit.
Here is a photo of my issue with the concave bow. My stem i think was cut at to steep on an angle. Not much i can do about it now. I might add some foam or filler to fix it some. Or maybe just make it nice and fair. I am not overly concerned with it.