I made a very simple "still" once. It worked like
In a 25 liter bucket i put a 10 liter bucket filled
I added a aquariumheater in the small bucket and
had a constant temperature of 40 degrees celcius.
Then i put the lid on the 25 Liter bucket and
waited (and waited and waited).
The air inside the 25 L bucket became saturated
with alcohol/water and condensed on the 25 L wall.
24 H later about 3-4 dl 40% alcohol was found in
the bottom of the 25L bucket.
The quality was very nice! much better than a
average fractional still.
To make this work you have to have strong mash,