You will need 4 feet for the build. Below are the various options and recommendations based on your setup. The Standard Build Set includes 3 SOLID FOOT prints and 1 CHANNEL FOOT print.
YOU WILL NEED TO PRINT AT LEAST 1 CHANNEL FOOT. This design allows you to remove the power supply from the enclosure without needing to remove the wires from your printer as well as run your power cord outside of the enclosure if you leave the PSU inside of the enclosure. The Standard Build Set includes 1 CHANNEL FOOT. Various inserts are also available including a SOLID INSERT if you just want to plug the hole, a HOLE INSERT for the PSU cable (for PRUSA MK3) or the CHANNEL INSERT for running the PSU cable outside of the enclosure.