No Jerry while I respect your knowledge you do have a propensity for honing in on the inane and senseless. The point you missed was that the case is closed at the point at which the problem is properly identified as needing correction. Whether or not it may work at some levels and not at others isn't even germain to the conversation when the installation fails to meet manufacturers specs with regard to electrical components. Having said that I personally guarantee to you that at some point where a screw as seen in the photo, connected to a wire, screwed into the metal frame of the panel does consititute a ground, does work as a ground. (unless it is a wooden or plastic screw- it wasn't) But that don't make no nevermind as the installation is improper because it is not in accordance with the approved methodology. Nobody can predict if it will ever fail or at what level because no one has tested the connection with respect to this or any other aspect of the installation. That is why it is incorrect, inspectors should never care about whether it works if it isn't properly installed, especially with electrical components. I think we are both on the same side on this entire issue.