MM: If you had 2.5lt at 70 and add water to make the vol up to 4lt the ABV will be 43% which is a little high for the Airstill if only from the point of view that it makes separation more difficult.
IMO 30 is best for a spirit run and allows for relatively easy separation of the heads.
From experience, if its a sugar wash 250ml will be right but taste check using a teaspoon with a few drops of water on and collect a few drops of distillate from the outlet after the 250ml and mix before tasting. Check for no burn on and under your tongue then spit and rinse - don't swallow! No funny remarks lads!
Personally, I'd dilute to 6lt and split that into two 3lt runs. Much cleaner output - but that's me
AM
