I spent some time looking at old threads trying to find what models is a 6 grind “allowed”.
Here is what I found: Model 7-4 1/2”, Model 7-5”, Model 4-6”, Denmark Special and of course a Model 6. I am sure the Cap will mention if I missed one or more!
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Rod Brown
RKS 3846
RKCC CM-123
Whether you think you can or can not, you are right.