This is a solid version of the 3DVerkstan face shield that fills in the tray. With that I was able to add a .2mm gap to allow for stacking. I've successfully printed these in stacks of 2, 5, 10, 20. The original is here https://3dverkstan.se/protective-visor/protective-visor-versions/ by Erik Cederberg Keep in mind this will always be slower than printing 1-2 at a time on a bed. Stacking requires smaller layers, ironing and other settings that WILL slow this down. The advantage is this can run while you sleep/overnight/with little extra labor. How to set this up in cura? Check out the video -> https://youtu.be/G-0B3wtdCv0