>To be clear - methanol boils at 64C and ethanol boils at 78C. Are you suggesting that in standard distillation, there is still some non-trace methanol coming over at 78C?

From what I remember, the highest concentration of methanol is in the tails. That should tell you everything.

*EDIT* Found the paper

https://op.europa.eu/en/publication-detail/-/publication/0b9...