Yesterday before work I mashed in my first (small) batch of cold extraction brew, 11 hours later after work I went on with the brewing day. Lautering, sparging, boiling and chilling took some time as well, so it was late night until I could pitch the harvested S-23 yeast from the v1 Hacker Pschorr Clone and finally put the fermenter bucked into the fridge.
I'm very curious, how this turns out - the cold extraction as well as using a harvested and restarted yeast. I'm always 'panicking' because of a possible infection - but I wanted to learn something new and this may include a fail. And it's better to lose a small batch than a big one. It was the point of reviving the small setup.
The batch ended up at exactly 5°P original wort and I used Wai-iti hops during the 70' boil, heading for 12 IBU, to reach a balanced bitterness. I thought about using Tettnanger in the first place, but switched to Wai-iti because it's the one with the lowest alpha I have available, so it's easier to dose the calculated small amount. At that gravity even a tenth of a gramm seems to have a decent impact - and also I haven't used it purely for quite some time.
The task for today left is to clean my "cotton filters"... and planning my next small batch project: as I wanted to try these traditional style Munich Hell batches recently, I ended up with the lagers at the moment, but I'm thinking about switching to ales, to speed up my lab series.