I must be losing it. I cut my red string squares to measure 5.5 inches and then cut diagonally. That gives me a 7 7/8" side. When I sew on the two black and neutral triangles, I have a rectangle which measures 7" after removing the dog legs. How in the world can I get a 6 1/2" side? I just noticed there is another cut on the red triangles, but the instructions are only for the Companion Angle. How can I do that cut without the companion angle? And why in the world did we start with a 5.5 inch square if we're going to keep cutting off fabric?