the higher alcohol is in the heads and that part has the hangover stuff in it, so why shoot for the higher alcohol content? I am just worried about keeping the middles anyway.....
I have the milehigh one and love it. reflux enough and I have got 94 but use it for weed killer along the fence.....

The Brewhaus PSII is a CM(coolant management) type reflux still. The other two types of reflux stills are VM(vapour management) or LM(liquid management). Each of these still types are suitable for making a ""neutral"" spirit, basically vodka. The packing they use causes the vapour to condense and evaporate numerous times allowing them to produce a very high alcohol percentage while also stripping away most of the flavor of the distilate.

The flute is also a type of CM still. Sort of. The difference is that it uses plates instead of packing and the plate number will ultimately determine the amount of times it is distilled. The flute is a home sized copy of a type of still made by Carl Stills(and others but if i remember correctly OD used a Carl schematic for his design) and Carl sells them as ""modern pot stills"".
The condensor at the top of the still is called a ""deflagulator"" and is used to load the plates. Once they are loaded the water is turned down, almost off to the deflag and collection begins. At this point you can think of each plate as a simple thump keg. So four plates means four thumpers.
http://homedistiller.org/theory/refluxdesign/steps
There is a chart on this page that shows basic percentages for each time redistilled. You can see that HillBillys getting 88% with 4 plates is about right.
So whats the point of this fancy still that costs much more to buy or build and makes a lower percentage abv%? Flavor. When making whisky retaining flavor in the distillate is the goal. Bourbon rules require an abv of less then 80% and most commerical bourbons come off much less then that. Most full flavored whiskey(bourbon, scotch, irish ect.) are coming off the still around 70%. And for traditional pot stillers thats usually two or three times distilling. The flute(plated column still or modern pot still) allows you to produce a full flavored distillate at a desireable abv in a single run. The commercial versions allow you to disable plates so you can adjust to exactly what you want coming out the final condensor. OD included plate disabling in his second flute design but if you want one like that you are going to have to build it yourself. As far as i know Hillbilly is only selling their version of the first ""magic flute"".