4/3 - Well, I build the walls 3" too high. I left the 8' studs uncut, which doesn't factor in 3" worth of sill plate and top plate. The height of the wall needs to be 8' total, because you have to screw plywood onto it, and plywood comes in 8' long sheets. Ooops. Luckily, I noticed this mistake before I build another identically incorrect wall.