This casing is delivered in four versions: a.) The casing with german texts, nuts to be inserted while printing b.) The casing without german texts, nuts to be inserted while printing c:) and d.) The versions for nuts to be inserted after printing, leaving holes on the bottom The design was completely done in Freecad, its a completely parametrical version, the spreadsheet "aaa" is included in the Freecad-file, you can change values there. You need a cooling fan of 80mm that is screwed on top of the cover. The german texts describe what cables should be used at this place.