This is a mount for attaching Malolo's screw-less / snap fit Raspberry Pi 4 Model B Case (default height) to an Ender 3/V2/Neo/V2 Neo 4040 extrusion, or any other 4040 extrusion with dual 6mm channels.
Printed at 0.20mm layer height (or 0.28mm, it doesn't need to be pretty)
At least 50% infill (it needs to have some strength yet have a bit of flexibility)
The version I designed and printed is 6mm wide and grips the extrusion very tightly. It's 6mm thick so it can grip the middle of the case without blocking any port.
However the USB/Ethernet cable tension causes the case to pivot a bit, so I've also developed a 20mm wide version that will not allow any appreciable pivot but will definitely block ports.
My apologies for not having a Pi in the case at the time of the photos, I've had to switch cases.
The author marked this model as their own original creation.