wick grounding? It's odd that out of the eleventybazillion times I've set up RBAs without insulated wick holes, I've YET to have an issue....furthermore my wick solidly touch the bottom of my tanks, again with no issues whatsoever.
It removes one obstacle for people newer to wrapping SS mesh wicks. I'm all for ease of use.
wait till that insulation melts on to your wick, then tell me how it tastes...
Some of us run SLR coils, and that wick can heat up really quickly. ask the Zenisis guys.
It's a stainless sleeve insulated from the deck by another sleeve of delrin or nylon. Pretty neat design, and easily removed if you don't like it, which leaves a *huge* wick hole.