Al Smith
Mac Daddy
Just as a precaution any time you do any type of grinding it's a good idea to have plenty of venilation . It's not a bad idea to wear a mask although most of us don't to be quite honest about it .Today I had my groundie sharpen about 20 chains today. I heard him coughing. I don't know if the grinding was irritating him or not, but it was "the straw that broke the camel's back" for the purchase.--