I created a Raspberry Pi 3 B+ case with honeycomb vents. I also adjusted the mounting points to be more forgiving if you use screws that are too long.

If you are looking for a touchscreen case, check out my matching official Raspberry Pi touchscreen case here. https://www.thingiverse.com/thing:3363847

Here is the matching Raspberry Pi 4B case.
https://www.thingiverse.com/thing:3793664

Compatibility

• Raspberry Pi 3 Model B+
• Raspberry Pi 3 Model B
• Raspberry Pi 2 Model B
• Raspberry Pi 1 Model B+

Configurations

This includes multiple mount configurations;

• 75 mm VESA mounts
• 100 mm VESA mounts
• 8020 mounts
• No mounts

Also included are multiple top configurations;

• Standard
• Slotted for display and camera ribbons
• 25 mm and 30 mm fan cutouts
• Clean version (great for modding and remixing)

Features

There also is a retainer bracket that can hold the board without using screws inside the case. This bracket does cover the ribbon slots, so it is best used with the default or blank tops.

Assembly

To assemble you will need

• A #6-32 tap.
• 4 x #4-40 x 1/4 socket head cap screws.
• 4 x #6-32 x 3/4 socket head cap screws.

More detailed instructions can be found here. Assembly Instructions.

Updates

1/21/2019 Update.

• Added slotted, 25 mm fan and 30 mm fan tops without the honeycomb.

1/20/2019 Update.

• Since #4-40 screws are hard to find, I changed the bolt pattern to accommodate #6-32 screws.

1/19/2019 Update.

• Changed the honeycomb pattern, it is much cleaner now.
• Added a retainer that holds the board inside the case without screws.

1/18/2019 Update.

• Rotated the STL files to lay flat on the print bed. (SolidWorks has a different orientation)
• Added a 8020 mount base.
• Added a slotted top for display and camera ribbons.
• Added a 25 mm and a 30 mm fan top.
• Added a blank top.

1/17/2019 Update.

• Added a no mount base.
• Added a 100 mm VESA mount base.

This is remixed from 0110-M-P's design, however it is not compatible with it. This has a different bolt pattern.