- Whether gross lees create off flavors
- Whether fine lees create off flavors
- Whether gross lees create beneficial flavors
- Whether fine lees create beneficial flavors
- How sur lie impacts wine
- How battonage impacts wine
I've found articles that address 2, 4, 5, & 6.
1 & 3 are the big questions. There is a lot of misinformation that I liken to legends, that predate the internet. Pre Internet, we learned from experienced winemakers or books, both of which were of varying accuracy.
With the net, there is so much information available, and enough of us are reading to eventually weed out the misinformation.
I was taught to get wine off the gross lees quickly, and have found "authoritative" references that state the gross lees begin to rot immediately.
Yet folks are doing EM up to 10 weeks with no ill effects. So ... someone is wrong. I'm going to believe the practical evidence.
But we still need to think. Is there a difference between a pressed wine setting on gross lees, and an unpressed wine setting on the pomace? I don't think so ... but am not confident enough to judge.