@JohnB spacing distribution is something I'd love to have in my InDesign CS6

but switching to CC? Nah.

It has taken a lot of time, a lot of patience, and a lot of pedagogy. After the effort and understanding from the part of the OP I think this question should be reopened graphicdesign.stackexchange.com/q/116147/120647

@Danielillo I still don't get what is that question about. How to make sure that artwork fits in an inDesign frame?

It's about exporting assets after selecting a design and dragging it to the asset panel (Illustrator CC2018) or fitting artboards to the selected design and save a copy as EPS or AI. This OP is new with Illustrator I guess and doesn't manage the workaround very well.

Is the Scott's answer but with the "fit" in the middle

@Luciano Actually I have just read Scott's answer for the second time and is that 100%. If the question is reopened it is a duplicate by sure.