Earlier quoted context omitted.
Batch size has nothing to do with it
You have no idea what you're talking about. Please Google it.
The methanol doesn't "come out in the heads" and batch size doesn't affect the final concentration as a % because roughly the same ratio is present during a run with a slight in crease in the tails due to the with methanol bonds with water.
https://op.europa.eu/en/publication-detail/-/publication/0b9...
https://www.sciencedirect.com/science/article/pii/S240584402...
Methanol poisoning comes from tainted consumables.