I can see that working, I used a dremel attachment before I purchased the electric grinder and its essentially the same idea. I'll point out a few things that affect my consideration for sharpening & chain longevity. Typically, I may get 7 or more sharpenings out of a chain which is about the duration I can run chain before the stretch becomes so excessive that I cannot properly tension the chain on the bar. I may get heavier wear on the chain due to filings down the raker teeth to allow to take larger chips and cut quicker so some folks may not see as much stretch on their chains. That being said, I can purchase oregon 20in chain at 3/8 kerf 72 count 0.050 chain for about $12-$15 per chain, when I purchase a 4 or 5 pack. For myself, the chains are so cheap I consider them disposable after half a dozen or more sharpenings. Stihl chain is slightly tougher as the teeth are a bit harder, you can tell when your sharpening it on the grinding wheel but at $25-$30 per chain its not worth it for me. If I were only running 1 or 2 saws, I dunno if I could justify the $300 investment of the electric grinder, after all, you could easily purchase 20-25 new chains and keep a stockpile.