I use airplane shears for cutting silver. Remove the front screw, grind off the serrations & sharpen. This gives a nice clean cut when you trim or cut silver sheets. I cut up to 16 gauge with this.
i do the same thing.. tho i use a longer blade.. i find i get a bit of a riffle from time to time if i have to take small bites.
i would say your sharpening setup is a bit mor sophisticated than mine