That's a testable claim, anyone up to the task? It also says nothing about any variation in blade edge exposure along the length of the safety bar of any one particular mass produced Gillette razor. Nor does it undermine the many vintage users here who are happy as clams with their daily drivers despite the need to engage in the gentlemanly art of aligning the blade by sight. Each of us is subject to bias, at this moment we just don't know how much this matter really matters.Some research I've been doing....
- On page 5 of a ~1958 Gillette Salesman Manual, Gillette's adjustable razor is said to go from setting "1" (most mild) to setting "9" (most aggressive) by adjusting blade exposure by only 0.008 inches (0.20 mm) and also by making the blade angle larger by 10 degrees (note: I'm guessing this is the steep blade angle). So, apparently, each numbered adjustment setting changes blade exposure by only 0.025 mm and angle by just 1.25 degrees. So, what portion of a numbered setting's aggression is due to the microscopic 0.025 mm change in exposure?