I trully appreciate everyone's input in this issue, and don't mean to be dismissive in any way. I am just pointing out that the distillation (after commercial NGS production) is essentially nothing but process. It isn't nuance, or technique, it is just process. There is no conceivable way that using a "lesser piece of equipment" and by that I mean a still that is not able to increase the proof of an alcohol, can remove anything at all from an already produced NGS. The "process" of distillation has already been accomplished at the NGS stage.
A still can certainly remove components that are "left in" a non NGS proof distillate, but that is a completely different thing. The way to change the makeup of an "NGS" has to start at the beginning. The mash bill, the yeast, the fermentation temp, the fermentation time, etc.. All those things affect the end result.
The distillation "process" on the other hand is not going to remove anything the 2nd or 3rd or 50th time, if the proof is not increased. The only thing that a post NGS distillation can remove, is impurities that are added post NGS process (Such as water contaminate.
with that said, I am assuming the question asked was I reference to a pot still, not a column that had the capacity to change the actual makeup of the distillate.
prost.