I set up a few scenarios and based on my questions above it looks like…
There can only be one cpt linked to the cpt_place at a time. If another cpt is linked to cpt_place, it will become the active link, disabling the prior one. If you go back to the original cpt and re-save it, it will then become the active link to cpt_place and thus disables the other. So basically there could be any number of cpt’s linked to the cpt_place, but the last one saved will be the lucky one!
There can be many levels of links. I created 5 cpt’s, each reflecting a level, and then linked 2 to 1, 3 to 2, 4 to 3 and 5 to 4. Each listing has a tab to the level it is linked to and works good!
Having more than one cpt to the cpt_place, or any other cpt, would be ideal and hoping you can tell me I just overlooked something 🙂
Thanks!