normally i use each of my razors in a rotation each shave with a different type/make of blade each time, but what I'm contemplating is using the same type of blade each shave in each of my safety razors, perhaps 3 shaves each blade, then another new blade from the same pack for 3 shaves etc, giving a + or a - to each shave, to see what blade works best with each razor, as i know some blades are good in some razors and others not so,the experiment may well take a while to complete, but i will give a mark to the blade each shave and a comment regarding each razor and blade in the "what did you use today" thread, if anyone wants me to try a particular blade in a particular razor, let me know and I'll try and get round to using it