The mainboards are unfortunately the common thread with all the issues I have with their printers. My Neptune 3’S mainboard has a well documented fault that they refuse to admit to and would not replace.

The Mars 5 Ultra that MC took back had a faulty board, and the replacement board was also faulty. It was three months of arguing, pics, video, and escalations before I told MC the story and they took pity on me and returned it. Elegoos concession was to send me the smallest bottle of their cheapest resin for a printer I no longer had.