Another ATX power supply housing.
I bought a cheap new 500W ATX power supply.
I added a variable DC/DC http://bit.ly/2SF20gj , it is connected to the 12V rail.
I added a rocked switch ( http://bit.ly/2SG2hjl ) as ON/STANDBY on the front while the ATX power supply has an ON/OFF switch on the rear.
Cheap 4mm banana sockets can be found at http://bit.ly/2SG2J11
It is not required to open the ATX power supply. In case you decide to open it WARNING it has letal voltages inside! Take care! Disconnect it from mains and wait some tens minutes time to discharge capacitors.
Two nylon nut PCB standoff are used to fix the print to the bottom side of the ATX box. See http://bit.ly/2SDuJ5q
Other two longer nuts are used as bottom rear feets.