From Rhino to Revit sub-categories

Hello, community!
I am trying to import a bunch of solids (closed solid polysurfaces in different layers) in Revit (each layer into a sub-category) via RIR. I say I am trying because I am new to Grasshopper and I am learning it from scratch right now.
I am trying to follow Mr. Davidson’ steps in his video Organize Rhino Geometry into Revit Subcategories where he imports a canopy into Revit but I can not reproduce his Grasshopper file. I’ve looked for it throughout the entire RIR website and this forum, but no chance.
Can some one post that Grasshopper file for me?
Thank you.

See attached. Let us know if you have any questions.
RIR-sample-subcategory.zip (7.9 MB)