Extracting the Raspberry Pi's 40 pin edge connector can be a bit delicate at times. So I designed this extractor.

Printing:

• Obtain either two screws M2.5 or two screws M3, each with a thread length of at least 12 mm .
• Obtain either two nuts M2.5 or two nuts M3 (matching the screws).
• Print either the M2.5 or the M3 version of the extractor (matching the screws and nuts). No supports required. I used PLA through a 0.4 mm nozzle and with a layer height of 0.3 mm.

Assembly:

• Insert two nuts into the extractor and pull them to the end stop with the screws.
• Unscrew the screws.
• Insert the 40 pin edge connector into the extractor. It should be a tight fit. You may optionally use glue. I use Revell CONTACT Professional.

Insertion:

• Plug the assembly onto the Raspberry Pi's GPIO headers. Unless you had applied glue you may have to press the edge connector down with a small screw driver between the pins.

Extraction:

• Insert two screws into the nuts.
• Extract the edge connector by alternatively tightening the screws a few turns.
• Unscrew the screws.

The Raspberry Pi PCB's two mounting holes adjacent to the edge connector must be plugged with screws or hex pillars in order to provide the extractor's M3 screws with a counter force.

As always I include the OpenSCAD source file for you to adapt and/or improve:

• Download and install OpenSCAD from https://www.openscad.org
• Launch OpenSCAD and open the enclosed OpenSCAD source file (/File/Open).
• Amend the parameters at the top of the file or even amend the code.
• Save your changes (/File/Save).
• Render the design (/Design/Render).
• Export the rendered design e.g. as a .stl file (/File/Export/Export as STL).
• Slice and print.

See my other designs at
https://www.thingiverse.com/thinger13/designs

In particular
https://www.thingiverse.com/thing:6449585
https://www.thingiverse.com/thing:6500953