I've had a different design in mind: curtains. It'll take two rods bent into a square-ish U shape, 14 inches wide and 12 inch long arms. The ends of the arms will be connected to the V Slot extrusion, one rod at the top of the printer above max Z, and one at the bottom, just above the Z motors. Attach a length of cloth or plastic or whatever to the rods so it surrounds the front of the print area and closes off the top, and attach another piece to the angled edges of the back of the frame to close off the back. Simple, once I figure out what to use for the rods, or whether to print a set. It'll keep all the electronics and motors out of the "enclosure", except for the extruder motor, and that can be fixed by using a bowden extruder.