After 300+ batches of beer, 3 ciders, and 4 mead-like things, I'm eyeing one-gallon wine kits. I have Little Big Mouth Bubblers aplenty ... can I use one for primary? For secondary too, or will there be too much headspace (~1.4 gallons for 1 gallon of wine)? I'm happy to buy new fermenters but don't know what the best ones are. And is there any other equipment I'm likely to want or need?