I'd never heard of the molar method either but I am strongly in the bias camp unless it's a wall hanging because of the wear factor. About 10 years ago I printed the chart Joe referred to from piraterogers and have a copy in my sewing room, my wallet (reduced to 3"x4") and in an important papers file. I use the wallet one when I see a great stripe while shopping. The fabric is used selvage to selvage so there's no extra as I see it. The only disadvantage to me is there are a few small segments in the strip.