These are various parametric FreeCAD and OpenSCAD files of 3d-printable organ parts. I keep making youtube videos as explanation, feel free to post a GitHub-issue if you want something explained (so I know how it prioritize things).
One can wrap steel string around ’spring making help’ to make ones own compression springs for instance for valves. Youtube link
Exploring the Nachtigall/Vogelschrey stop ‘Nachtigall2’ is less annoyingly synchronous when playing more than one pipe at once.
‘mini-voicing_chest.scad’ is explained there.
‘one pressure sensor’ just reads input from one force sensor on an Arduino.
‘Wind/Balganlage' is the bellow, works pretty much like in a barrel organ. It will be connected to the wind chest with a round flex tube (like for air conditioning).
‘old-misc/Several in one' connects the flex tube to the wind chest and has the connection to the air pressure measure and cone opening that is to be used as a pressure relieve valve (with a small steel sphere).