It’s early days, but I somewhat sympathise with the OP. The Niche Zero is a lot easier to dial in - it’s almost “set and forget” for a given type of bean.
With the Duo, so far, not quite so much. The effect on relatively minute adjustments can be significant in terms of extraction, and I’m finding myself tweaking the grinder slightly every time.
Appreciate the burrs are not yet seasoned properly and all of that nonsense (I put approx. 2lb of coffee through for seasoning purposes), but I don’t recall having to do the same with the Zero.
Anyways, early days, and other people’s experiences have been positive.
Taste wise, I’m liking it. Once I get this grinder tamed in terms adjustments, I’ll do some side by side comparisons.
@thusband - I also removed the lower burr carrier from the grinder to take a look, and was wondering if it needed to go back in a certain position. Then the penny dropped and realised I’ve been silly as that is the spinning burr. What I did was to clean it all very well, then placed the lower burr carrier in the grinder, gave a little twist/spin with my fingers to make sure it’s sitting properly and adjusted the top screw as instructed.