Creating new Nodes and Pipes for modeling SU in OPEN ROADS

Hi everyone, I'm looking for a well-explained lecture (video better than paper) about the workflow for creating new nodes and pipes, conduits, ducts, inlets,.... for modeling in the SU workflow delivered in OPENROADS and OPENRAIL.

I need to understand the whole workflow since creating the top and bottom cells and their linking points to create the prototypes through the element templates, feature definitions and so on.....

Thanks a lot.