Amazing! One more reason everyone should upgrade to a duet.

Not sure if this is possible with the hardware but currently I can use an octoprint plugin to send a pause command when an optical sensor sends a GPIO pin low on the Pi i.e when the filament runs out. Would be a great add little add on to the firmware if there is GPIO on the expansion port.

Thanks for the update. More than happy to wait. How about sending out the trash boards as coasters!

I'd prefer White on Blue but would be Ok with Black on Blue. Maybe you could label the sockets with stickers as well as a diagram?
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