Very pleasantly surprised to discover the Voron Design open source 3D printer community in recent weeks. I'd heard the name but didn't know much about it, especially the size & broad scope of things.
So many experiments & side quests, not just in 3DP, but across all kinds of CNC, kinematics, embedded hw, & of course, software hacking.
There's also a network of very cool small businesses supporting all this with kits, components, innovations etc.
https://vorondesign.com/Trying to avoid starting yet another project of the venerable "crazy but not actually impossible" class.