tompoland To be clear, my mad plan involves first getting all of the 83mm burrs here (still five sets to come) and seasoning them and comparing them using the DF83s sitting in my roastery. They may never see the inside of the Duo, that will depend on some carefully caliper measurements first.
The critical thing is that the lowest portion of the grind path is above the edge of the carrier and sweep arms. I have 4 different types on order to test.