Still trying to get corridors to work - it's getting better except intersections
Looking at the Curb Return Fillet assembly properties, I'm not clear on how to add subassemblies to it, or change / swap subassemblies. I can delete the cut and fill ditch that came in as default, but in the image below I'd like to swap the UrbanCurb for a Valley Gutter, add 6 ft of 4% up, 5; of Sidewalk at 2%, and then another two ft at 4".
The option in Prospector to Insert to ModelSpace is greyed out, sO I'm stumped on how to go about this,
curb-return.PNG