Since I’m adding a third story that wasn’t in the original design, the slanted roof pieces needed to be cut to meet the third floor walls at a right angle.
I also needed to create side walls. Since the right wall hadn’t been used yet from either kit, I modified these by cutting off the bottoms, then cutting openings to create access between the small roofed-in areas and the large room. The pencil marks below show which portions were cut.
The larger opening will lead to an extension of the room, maybe to be used as a closet area.
The smaller opening is a doorway into the bathroom. There needs to be more wall on this side since it’s where the stairs come up. For some reason I thought it would be a good idea to extend the opening all the way to the back, but in retrospect I should have left a small piece to create a proper doorway. Once this portion is glued together, I’ll fix it with a piece of strip wood.