Just a quick question in this vein - I want to do something similar to this for fun - how much headroom should I leave and how much yeast should I use?
(I already read that 700grams of sugar per gallon - or 200grams per metric litre)
I will make 2 x 2L batches with different yeasts but everything else will be identical between batches.
Safale S-04 and Nottingham I think will be my yeasts - as long as my LHBS has them both in stock..
Also will use proper air-locks cos I already have them.. LOL