Variable power supply enclosure SK120, ZK-4KX (regular 4mm banana plugs and smaller)

I refined the main housing of that very nice original project ( https://www.thingiverse.com/thing:7099981 ) the differences just are: widened banana-sockets (to 6mm) the sockets for 4mm plugs come normally with a 10mm shield and so I did a slight/.5mm imprint the through-holes are a bit stronger for daily use the housing also got 4 rubber feet the rest was just perfect for the original build :) / you will find the back-lid there variant: only 45mm depth (*-short) / ZK-4kX smaller holes, easier to print, a bit more robust