This is an enclosure for the RepRapDiscount Smart LCD Controller, designed for use with a Kossel printer using 20x20mm extrusions for the base.
It is a scaled version of schlotzz's excellent design (see remix source files), but upsized for 20mm extrusions.
Folger Tech Kossel 2020 Rev B
0.2mm layer; 0.4mm Nozzle
Some supports for the SD card slot are pre-built in to the design.