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There you go. Bluesman makes razors so Id go with his words more than the rest of us. Although we all were not too far off.
Thanks Victor!

Close. I don't have the time at the moment to do the math but... A 1" wide blade needs a 1/4 thick spine. Go from there. 4 to 1 is the magic number. So you're in the ballpark. I read a lot of folks...