For mounting the octopi on the printer it works with. requires some drilling.  Fan is a Sunon KDE0504PKV2.  Available from DIGI-KEY.  Thangs still does not allow upload of FreeCad files.  I tried.

Rpi4OctopiCase

Pi4case-CaseBody.stl

Print 2 of each part. 
Add 4 bearing assemblies. (https://www.amazon.com/dp/B082PQ3SC4?psc=1&ref=ppx_yo2_dt_b_product_details) 
Low drag filament delivery system.  Even covered the problem with my weak extruder that was grinding.  No real license, just give me credit for the original please. 
@Thangs, I'm curious as to why you ask for pictures, and then don't show them anywhere.

Filament Roller Support

SpoolSupportPartA1.stl

I really needed to organize and clean my electronics workbench.  The boxes are long enough to hold breadboards with a little room to spare.  The feet secure a top box to a bottom box to prevent them sliding off one another.  Two of the smaller box (box3) can fit on the larger box (box2).  Curious about box1? I'm learning Free Cad.  We don't talk about box1.     :P   Both are 75mm high, and 200mm long.  One is 150mm wide, the other 74mm wide.  For 'Catagory', I know this is not a Character, but the system will not take the change I suggest.

StackingBoxes

Box02-Part.stl

Activity related to collaborating with others on models

Likes, comments, and activity from your community

A roundup of models that we think you'll like

For when we think someone might have posted your content as their own

New content from your premium memberships

Emails and messages from designers you follow

Centari

Achievements

Seedling

Explorer

Rpi4OctopiCase

Filament Roller Support

StackingBoxes