Thanks Adam, I'm actually glad you replied because your still shown on YouTube is what I was thinking when I referenced the vapor gate.
Ok the barrel aging actually make sense to clean up the spirit.
So in this vendom I assume tails (or most of them) fall out as bottoms, and heads/hearts move onto the doubler. What the purpose of the doubler in this specific design? I can imagine how heads are kept a vapor but hearts are condensed.
Thanks,