Here's a Youtube channel with similar content. https://www.youtube.com/user/thang010146/videos https://www.youtube.com/user/thang010146/videos I found it a whi

Here's a Youtube channel with similar content. https://www.youtube.com/user/thang010146/videos https://www.youtube.com/user/thang010146/videos I found it a while ago while deep in "related" videos, it's one of the few channels I'm subscribed too. As I understand it, he's retired with a doctorate in mechanical engineering, and just likes making little mechanisms in Inventor.