I'm not generally impressed when I visit distilleries but low and behold what I found in Ohio farm country East of Cleveland.  Although the inventor was not present, I believe these are back to back continuous column vacuum stills.  Both seem to have infusion abilities.  His nephew told me that the inventor built his first still at age 12.  There are a couple of additional photos on their FB page.  I have no additional information.   https://www.facebook.com/SevenBrothersDistillingCo/