I have a brand new para 3 Rex 45 ... the edge was wicked sharp out of the box as I cut prob 4 ft of heavy 3/8 cardboard and the edge had visible and feelable rolling on it. Would this be due at either a wire edge being there? Although I inspected closely when I got it and didn’t see it notice one being there, or could it be from the factory or needing to sharpen the weak grinded edge off?