Just been chatting with James at Niche who seems like a great guy. I’m going to return the Duo and just hang on to the Ode 2 and Mahlkönig.
I really can’t fault the Duo, it was great to try and it’s clearly a very well designed, well made product. As mentioned a few times I’m just looking for a unicorn of a grinder that I can easily jump between espresso and filter with multiple times a day with just an adjustment back and forth. I don’t think such a grinder will ever exist and unreasonable to expect any grinder to do it well.
It is possible, and obviously better with both burr sets but I think for me the compromise of having two dedicated grinders outweighs keeping the Niche. I think I also prefer on-demand dosing for espresso too.
Again, glad I tried it and if I was only drinking espresso I’d have kept it because as a no/low-retention espresso grinder I was really impressed.