I'd be curious to hear some experiences of having done a primary fermentation until it's essentially completed (or close to it), then adding a considerable amount of new wort (similar to the original, already fermented wort) to kickstart a new phase of secondary fermentation.
Here's what provoked the musing:
I've started a series of experiments in which I brew a batch with a given recipe, but then split it into 6-9 small FVs (roughly a half gallon each), each with a different yeast. The idea was that a couple of months down the road, after sampling a flight of these 'limited release' sub-batches, I can then decide which yeast(s) to use next time I do that recipe, and do a larger batch.
But perhaps after 14 days of fermentation, I could sample the early beers as they're mostly done fermenting, and if some stand out as clearly superior to the others, I could then add another couple gallons of new wort to those, right ion the same yeast slurry bed -- essentially a secondary ferm in the same vessel without transferring (and of course, trying to minimize oxygen ingress).
Anybody have some experiences [/mishaps] with that, or have advice on things to watch for (or not do)?