These are the 'Fit-Up' parts I used in my electronics projects for Robotics & Arduino.
Maybe some of them will help you with your projects ... I use them to make sure everything will fit together correctly especially with my 3D printed items.
400+ Parts Uploaded ... Several Modules drawn as single Part files so they are easy to use in your Solidworks Assemblies. The entire module is just one part file.
Very helpful for Photo-Realistic Renderings when making tutorials.