I've been using a MEC 600JR for well over 20 years. I have an auto primer feeder, plastic drop tubes and use the adjustable charge bar. It is grounded in a shallow wooden box screwed down to wooden table. And only use black powder or pyrodex. I have never seen any static electricity on any of my equipment. Have to wonder if this is all just a load of BS as I have never heard of a gun room going up in flames due to static electricity and black powder.

Nothing is foolproof to a sufficiently talented fool.