I think that there is another way to progress, get a test protocol ironed out and then see if it correlates with a "good shave" in the minds of the concensus. My Feather and two razors honed by Lynn, but not my selected NOS razors, will strip Dai-Riki 4X monofilament tippet material (0.007 inch diameter) but not 5X. These three razors and my selected NOS razors will strip 3X monofilament. So there's a starting point, anyone interested get some 4X tippet monofilament and start stripping, boys! :roflmao And if a razor strips the 4X monofilament, rate the resulting shave and see what we come up with. We'll collect all the observations and see if the idea is of any value.