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I highly doubt that. I could be very wrong, but how does a factory worker know the difference between a "nice" and a "bad" 41 blade? Remember its an assembly line... I feel thats why they have model...

I know this is an old thread but just pointing out that each blade has a number stamped into it. Blades with the same number are identical. Take amoment to notice all the 5/8's SS blades are 41's,...