Quote Originally Posted by Ama-fessional Molder View Post

If you wanted to get real fancy you can use a through beam, but why spend the money?
the filament check thing is easy. I had it figured out with a U shaped opto switch, left over from a pinball machine repair, that would trigger the z endstop. Laziness overcame me though.

My answer to C42's question:
  • retraction for inactive nozzles
  • quick change carriage/mount for extruder/hotend/zprobe combined unit - dovetail or something else that gives repeatability.
  • ability to easily remove the dual hexagon cooling fan shroud for service of hotends


No low hanging fruit there. Still using the c42 double (original) and still liking it. I don't print a lot of 2 filament prints, I mainly use the 2nd as an instant backup or to keep 2 different filaments ready to go. Have to be really careful to clean the unused nozzle so a nib of plastic doesn't pick the early layers of a print off the bed.