I agree, I have the 10 degree ruler. Signed up for a class, and used it instead of the 9 degree that everyone else was using. I had very little waste. The difference was that my table runner is about 1 inch longer and 1 inch wider than the one my friend made using their #9 ruler. I've loved the look of these, but took the class to understand the cutting. I'm not sure I would have done it correctly otherwise. For the record, my teacher cautioned about marking off the sections on your pattern (check mark) with a pencil once you cut them. 2 of the ladies in the class were visiting, and did not do this, and cut 2 of the same sections. The other caution I can give you is that my friend started cutting her strata lengthwise rather than across the seams. She was able to finish her runner, but the hardest part of this pattern IS the Cutting.