Tim Pelton’s tip on blocking 45° corners is fine, but I think I’ve got a better method. I rip a 4×4 on the bandsaw as shown in the drawing, with the table set at 22 °.Then I use the ripped pieces at the ends of each wall section. This trick wastes no wood, and also allows the sections to be securely nailed together.
Ron Milner, Grass Valley, CA