I've submitted the new design for the TEC controller PCB to OSH for fabrication, so should get that back in a couple of weeks.

On the print head front, i've managed to get hold of one raspberry pi zero in the UK, but that will take a few weeks till its in my hands. Just managed to pickup one from adafruit including camera module to justify the shipping costs, so should be able to run some testing of the head using a laser diode dummy load.

With the increase in production hopefully the zeros will become more plentiful in due course.