Warning this requires modifying the cables of the power supply. If you don't have knowledge with such things don't attempt this or do, I can't stop you.
lab bench power supply
internal measurements for max psu size
Length 220mm
width 84mm
height 72mm
buck boost converter link
6-36V / 5-30V Digital Control DC Buck Boost Converter Constant Voltage Current | eBay
Female DC Power Supply Connector
10pcs Female DC Power Supply Connector Socket Panel Mount Jack Plug 5.5 x 2.1mm | eBay
I found that all cables were supplying 12v except for the power on signal cables, they were using 5v. I also installed a 100ohm resistor to the 12v 40mm fan, so it wasn't running at full rpm to prolog its life.
the lid requires 2 5mm screw no inserts.
The author marked this model as their own original creation.