I'm currently creating a demo project which will show various ways to utilize the spawner and boundary system. I'll upload it to the store page once it's finished.
This is probably the best route to showcase the features and make it easier to understand on the users end.
I believe I have a good idea of what you're trying to accomplish here and there is a good way to handle this task with my spawner + boundary system that will be explained in the demo. You'll be able to see it in action and if it's what you need you'll be able to inspect the events which handle it within the demo and see how it's done :)
I appreciate your patience and will get this done as soon as I can! Thank you!