Adding this feature will allow the creation of a complex assembly for both mechanical and non-mechanical uses. It helps the user understand how the parts works.
How it would work:
A new tab for Assembly.
The idea I had was to create a joint where you select a cylinder in a part to create it.
Once a joint is created, you can click another joint to create a link that lets you rotate the part.
This feature helps understand how the parts work together before 3d printing or CNC.