@20ffb98d @5756e48c Now I'm thinking of removing the back cover permanently and re-doing resonance measurement, just to make it easier to swap nozzles.

That, plus not swapping fans, would take me from 8 screws to 2 screws to swap nozzle, which takes it from "wouldn't it be easier just to unscrew the nozzle form the heater and screw a new one in?" to "sure, no problem" territory for me.

Curious about how precise their manufacturing is; will I need to adjust Z height when doing that? 

 @2c1a2dac @5756e48c From what I can tell, probably not: the hotend is mounted _very_ rigidly, and (thanks to extensive disassembly) I know that their toolhead doesn't rely on the back panel for counter-balancing. My only concern is any loose wiring, but that's just a few zipties.