Guys,
Lord knows I hate to get in on a good argument, but don't forget the BOCA, and standard engineering practices, would probably appreciate some mention of NOT removing the oxidation coating on a connection. A tapped hole, it is not necessary to remove the paint (or coating) to achieve a proper ground, and BOCA appreciates our not beginning a 'rust' hole because we find it convenient. Just thought I would mention that so your proposal could take that into account BEFORE we step on toes.
