Box for regular lab power supply from CD-ROM housing

Box for regular power supply from CD-ROM housing
In this project 3 variants front panel and 2 variants back panel for different 220V connector.
Panel_v1 - for using resistors type 3296-a and double module volt-ampermeter.
Panel_v2 - for using simple potentiometer and double module volt-ampermeter.
Panel_v3 - for using resistors type 3296-a and separated voltmeter/ammeter.
For regular Volt/Amper i used 5A DC to DC CC CV Charging Board. For USB - DC-DC Step Down Converter on LM2596.
In my