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Yes but for now we will speculate ad nauseum :)

This is close to the 1 : 3.5 ratio suggested by the Das Rasiermesser written in 1939. A translation at nassrasur reads:

Do you have to? http://straightrazorpalace.com/advanced-honing-topics/35839-edge-still-stroppable-after-4-layers-tape.html

Thanks Ben