That's interesting [member=28519]cloddopper[/member] . However, in (at least most?) malt distilleries, the foreshots (i.e. the most methanol rich distillates)
just go round and round:
The key to not going blind is that there was never much methanol there in the first place, and in generally we don't drink whisky by the tonne.
The fusel oils are the larger molecules like n-pentanol, isobutanol etc, and in the diagram above come off last, and end up in the feints cut, which is then recycled to make sure the ethanol that came off with them isn't wasted.
It's true that freeze distillation doesn't remove them, but in the case of applejack, I'm also not sure what concentration they'd be present in to begin with? My simple head says that as long as you were happy to drink the cider, the applejack should also be fine to drink, as long as you don't over-indulge!