Ender Extender Electronics Box

Set up to fit:

Creality Mainboard
Raspberry Pi (Model 3 or 4)
Buck converter
5v Relay
40x40 fan

Mounting holes are set up to hold M3x4 embedded nuts (M2x4 for the Pi)

M3x8 minimum to secure the lid

Drag Chain hook up on the back for wiring to the heated bed.