DavecUK delta76 Cuprajake exactly. you will be hard pressed to find a flat 63mm burrs ;) Fiorenzato CS, and Quamar M80 both have 63mm flat burrs.,..In fact I tested a Quamar M80 back in them day (not a great grinder).
delta76 DavecUK strange, Fiorenzato CS shows to have 64mm FIORENZATO ALL GROUND 64mm Flat Burr Doser-less Coffee Grinder - MATTE BLACK - ESPRESSO MACHINE COMPANY I looked it up and M80 indeed has 63mm :o but my point remains - it is way more popular (and therefore economical) to find 64mm flat burr than a conical one (if there is one). It is almost a given Chinese made + 64mm to be flat :). well, almost
DavecUK delta76 DavecUK strange, Fiorenzato CS shows to have 64mm FIORENZATO ALL GROUND 64mm Flat Burr Doser-less Coffee Grinder - MATTE BLACK - ESPRESSO MACHINE COMPANY https://brooks-parts.com/en/fiorenzato-cs-grinding-blades-63mm-right
giampiero delta76 Fiorenzato CS ( Doge etc etc ) and Fiorenzato MC ( All Ground etc etc ), are not the same company, just same family.