I had a Comandante X25, rather than the C40 (but the same axle & burrs), and I have a Lido (same Etzinger burrs as the ZP6). I found the steps inconveniently large on the Comandante, and the stepless Lido easier to dial in.
I'm not a fan of grinders with the adjustment on the underside of the grinder, that rely on dissassembly/counting clicks to find your setting.
In its favour, I found the Comandante had a low grind resistance and was relatively easy to turn.