I have a Beverly shear B-3 model that I got second hand. The knives are dull and need resharpened. Do you know the profile of the blades? Do you know where I can get the profile for the blades? Do you know what the clearance should be between the blades? Do you know how to set the clearance on the blades? I got the blades ground so there wasn’t any taper in the blades. This I found was wrong. It almost looks like the bottom blade needs to be ground into a compound curve. Do you have any info on how to get these resharpened? Do not want a “smart” answer as to buy new blades!