Short story, I watched one of Nikodem Bartnik's videos about upgrading his Ender 3 by adding the Octoprint feature and I saw he made a fantastic Raspberry Pi casing. I intended to create one, but one problem. He uploaded the drawer only and not the holder in Thingiverse. So, I have to design the same holder myself using Fusion 360.

Here is his video:

Then, I realized it would be difficult for me if I have to screw the original holder to the aluminum frame due to its top design. So, I have to remix it a bit by separating it into two parts, the holder and top casing.

The drawer is still Nikodem Bartnik's original design. I only create the holder and casing. You can also easily remove the casing from holder.

Thanks to its drawer-like design raspberry are easy to access and you can simply swap them between different projects, it's convenient considering that it's almost impossible to buy those small computers now.

Thank you to Nikodem Bartnik for such an amazing design & video!

NOTE:

Once you open the files, they may be ended up with bigger models in your slicer.  If that happens, decrease the scale from 100% to 10%.

All defects that happen on the 3d printed casing are my printer's fault :)

UPDATE:

I recently uploaded the modified casing. The change I made is the hole for the plug-in USB cables for easy access and adding fillets to some edges to have better support on the model. I tell you just in case you notice there is some difference between files and photos.