I hear your concern, Boston--was there myself. I find if I take my time laying the blocks out on design wall (extra bed) it really helps. I also invested (that is what it felt like!) a 22" sq ruler that I use making t-shirt quilts, but also wanted because it has a scale on it for cutting the setting triangles and corner triangles without me having to do math. But there are many charts out there that help with that too. I say go for it! It's such a simple way to get a much different looking quilt.