After printing my lensboards, lenscaps and other needed items my craftbot printer sadly died on me.
The new one is a Anycubic Vyper which is printing really nice.
For my rather simple needs I construct with Openascad and slice with Cura.
Updating the vyper was fairly easy, you first update the mainboard with inserting the sd card.
But than (!) you update the display with a micro sd card. This card only works if it is fat32 4096 bit formatted, I used an old 8Gb card.