So far I have had the schloss apfelwein, etienne dupont and bordelet** in the (cold) fridge for a few weeks.
Being small amounts, it's pretty impossible to take gravity samples so I have had to rely on pressure build up as an indicator of fermentation and when no more is released, guessing that fermentation has finished.
I've boiled up some small vials to keep samples of the yeast/bacteria cultures.
Today I cracked the schloss apfelwein, poured off most into a jug and the dregs into one of the vials. First smell wasn't promising and on tasting I got sweet, very slightly sour apple juice. No amazingly unpleasant but not what I'm chasing and I would guess the sour will just increase if not kept cold.
Measured the gravity and got 1.050 so guessing that one's a failure and my earlier (stupid) opening of the bottle to smell what was happening has encouraged acetobacter. Dregs down the sink.
Opened the etienne dupont, poured into a jug, gravity sample is 1.002. Very very funky, bready aroma and flavour. Quite full on funk but definitely in the ballpark of French cider and suggestive that this yeast* is reculturable from the bottle and will ferment out a juice without assistance from any other known strain. I will be hanging onto these dregs as I have managed to get character twice from this cider now.
Juice was preshafruit pink lady.
*or various micro-organisms including yeast
** Think I wrote earlier that the bordelet had gone into the blend that was discarded but I have a preshafruit bottle with bordelet on the cap so I am presuming it was the ecusson that got chucked. Amazing scientist I turned out to be.
One thing worthy of note is that I have not strictly controlled the temperature of these - normally I would ferment cider at around 14 or lower.