I wrote the same in this thread, but maybe it makes more sense to ask here. Apologises for the double content.
I am about to put together a Dust Deputy and was looking into grounding options. Some people use internal grounding, some use external. This grounding kit’s instructions refer to both: internal as main grounding, external as extra.
I think I have a fundamental gap on how external grounding works. Assuming we use a plain non-conductive hose and the static build-up is happening on the inside, why do we need to ground the outside?