Anyone with a mini e use it for both espresso and drip grinds?

I'm told (by a salesperson) that adjusting back and forth over that range ruins the calibration, so that your espresso grind index point will not be repeatable. This, reportedly, applies to any grinder, not just the mini e.

True?

In my experience with the Mini-E, its easy to go from espresso to drip. Going back to espresso is easily repeatable, but will require 2-3 shots to settle back properly. I assume this is the time required to purge some of the more persistent larger coffee granules and also perhaps to reline some of the nooks and crannies with finer grinds. A bit of a frustrating exercise, and if you don't hold the course you can easily end up chasing your tail when its not really necessary.

The adjustment mechanism will allow you to do that. I don't really understand the point your sales person is trying to make. Going back and forth is easy, and I have not had any trouble to return to a precise espresso setting. Or actually I often forget to check what the precise setting was before adjusting to coarser, but that's my fault...

The other thing is that there will be quite a lot of leftovers in the chute, as gyro wrote. Brushing the chute between different settings is a good idea. Also if you use the timer for dosing, you need to run the grinder long enough to fill the chute again, or otherwise the dosing will not be accurate at all. So going between espresso and drip is possible and quite practical, but be prepared to sacrifice 2-3 shots when returning to espresso fineness.

The third thing is that Mini-E is not that good for drip. It is an espresso grinder and does produce quite a wide distribution of particle sizes. Recently I have been adjusting for the perfect pot coffee setting (very coarse) and noticed that you either get quite a lot of fines or quite a lot of big lumps. The latter seems to work better, only the grounds look a bit clumsy and unprofessional.