I belong to a BOM (well, 6 to be exact) and one month the block had 81 pieces. But...it looks a lot like yours. Their directions were horrible. I knew it wouldn't end up being 12 1/2" so I quit altogether. Now, I think I can use your way and do it. It has the exact same blocks as this. Like the three triangles together. Someone suggested I paper piece it and I nixed that idea. My hat is off to you. You should go on YouTube. I'd follow you!!!!!