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Pre grind basically goes "stale" after an hour.
I watched a James Hoffman video review of our filter machine (Sage) and in it he mentioned that it was a machine he used on a regular basis at home. He specifically mentioned that he often grinds his coffee the night before and sets the timer in the sage to have a brew ready in the morning.
I know he's not exactly Infallible Coffee God but I just remember it being interesting to me that somebody who is a genuine expert on coffee was happy to pre grind their morning coffee the night before.
To me, that indicates that I would personally probably not be able to taste a difference.and that if James Hoffman can, it's not enough to put him off pregrinding 8 to 10 hours early or so.
Quick opinion check, for those of you who head off for a few days. What's your preference? Grinding a batch with a better motorised grinder, or grinding fresh with a basic hand grinder (Rhino/Porlex etc.)
And another for those who do/did single dose. Do you think that the benefit of not leaving beans in an open environment for a while outweighs the variation in grind size you get as a result of 'popcorning' when single dosing? Looks like some grinders (like the Niche Zero), do a pretty good job of minimising that, though it's definitely noticeable on my Sette (not helped by the fact that the impacted grinds are always at the top of the pile.