Box for a small Buck Converter with screen. Prints flat without supports. Holes included to ensure decent airflow.
Designed to fit 'DC-DC Buck Step Down Module LM2596 DC/DC 4.0~40V to 1.25-37V Adjustable Voltage Regulator With LED Voltmeter" from https://s.click.aliexpress.com/e/YqwxQa4.
Amended screw holes so they cut in deeper to minimise likelihood of them shearing off.
Added small lip to help hold the lid in place.
Tight fit, place one end in the carefully squeeze board past the lid supports.
Press in clips
Tight fit, will fit thicker ender 3 aluminum extrusion. If they don't go in do not force or they may break, tidy up with an exactly knife if needed but don't cut too much off. If they are loose or you want extra strength there should be enough surface area to nicely glue.