After more trimming adjustments, everything finally went together and I was able to glue it, clamp it using masking tape, and leave it set up. I also installed the window panels that came with the kit so everything is finally complete on this side. Well, except for siding, painting and the like.
The dining room side came together fairly well, except that I didn't allow for the one and a half inch extra space needed on the new panel I made. Instead of tearing everything apart (of course I glued it together before I realized this!!) I opted to cut a piece to size and glue it in. It will be covered with wallpaper and siding, so no one will be the wiser (except for you and me! Ha!).
I'm well pleased with how the rooms have come together and how everything seems to be esthetically balanced. I put together the bow windows on the breakfast room addition and at the front of the house. The foundation pieces went together fine on the parlor window, but I had to do some finagling on the breakfast room window as I had added a half inch border around the outside of the room. Rather than have the whole piece angled, I opted to cut it and place the two inside pieces parallel to the underside of the room. It looks much better and I'm very pleased with how it turned out.
Today I'll be adding the roof. I've been dreading this part but the manor must have a roof and after what I went through to add the additions, it should be a piece of cake . . . she says rather optimistically.