Yeah, he's pretty good.

I always thought the problem with spotting stemmed from mineral deposits left after rapid drying, now I'm wondering if it's residual carbon. Whether soap, detergent, or oil, etc.

BB's comment about leaf litter in his barrels, has me wondering.
But I still stand behind the paranoia defense. If I'm going to do all the pre-finishing work, I don't want to risk my labor on un-distilled water.
A turkey fryer, a milk can, copper fittings, and a couple milk jugs will forever last.

Out there doing it best I can.