Can I chuck my hat into the ring?
Right, first off, this is not an engineering review. I was lucky enough to be asked by Niche back in October, to accept the latest version of the Niche Duo. I had to sign an NDA and that was that. A couple of days later, a package turned up and I thought, I recognise that. On inspecting the packaging, it is quite clearly designed with the Zero experience in mind. The packaging has instructions printed on it for starters. Once you open the outer box, there is a strap/handle to help you lift the inner box meaning that you do not have to tip it upside down to force it out!
I received a gleaming white model that arrived with espresso burrs fitted to it. A quick glance through the comprehensive handbook to make sure that there was nothing I needed to be aware of, and coffee here we come! When I dial in a new grinder, I always pull the first shot at whatever it arrives set to and take my reference from there. The third shot was spot on.
16 gms on an espresso setting takes me 16 seconds. I did not suffer from any static, the grounds were nice and fluffy. I believe the burrs originate from Mazzer (both espresso and brewed).
Eventually, I thought it was time to try swapping the burrs over. Again, no help from Niche. They selected me as tester for their idiots instructions, and I feel well qualified for that role. I have made a video that I will post and it took me 70 seconds or so to swap over. You raise the lid, unscrew the silver dial, remove the screw to tighten down the top burr set, then remove it. Push down on the bottom burr set and remove. The process is then repeated with the brewed burrs (these are a different colour, blue) in reverse of course.
I am deliberately keeping this summary vague! I have no idea as to how they get a big flat to be retention free. Having swapped the burrs over many times, and since access allows with ease, whenever I clean it out the retention is minimal. If I remember I will weigh it at some point but as any Niche Zero owners knows, you learn to trust your machine and just accept the claims!