Specialty Equipment (Rebar) Spacing

My script is functional (and I’m sure it can be streamlined). I draw a model line on a column. Select the column. Define the offset from ends, rebar cover, first and second spacing. It works while I’m in the editor and run it twice. For some reason It won’t change the size of my stirrups after they are place. I’ve played with a pass through node but don’t think that is what I need. If I run it in the player, it works with errors in the group on the right. Any suggestions on the error? Or streamlining? So much to learn! Also, how do I add the image so people can zoom in?

Column Rebar Spacing WIP3.dyn (139.4 KB)