Thank you for your kind words about the STEMFIE project and for your contributions! I like the thought being able to make dynamic STEMFIE parts; I've thought of many different ways of doing it, both in FreeCAD but also using OpenSCAD and CadQuery.
Nevertheless, since my STEMFIE project is a one-man-band, I have limited time and, therefore, I am focusing now on designing an array of all the standard parts (static) in different sizes and configurations. In due time the dynamic parts will evolve and I appreciate all the help the project can get. I also encourage everyone to make parts and expand the system.
I love the fact that you are using STEMFIE at a 3D-printer party in Barcelona!
Years ago, I visited Barcelona when I worked with McNeel, the company making Rhino 3D. I love your city and the people! I'm looking forward to seeing what you all make with the STEMFIE toy!
Regarding the fasteners - the threaded and cam-locking versions – check the link below:
https://stemfie.org/temp/STEMFIE.org_sa ... -files.zip
Stay tuned at stemfie.org and the newsletter for future releases.