Hi Dan,
Thanks for your questions and I apologise about our delay in responding to your queries.
As it turns out I have recently answered these same questions in another post, found here: https://ewbchallenge.org/forums/topic/structures-3-2-keeping-places-for-artifacts-on-country/
If you have any further questions, of if I missed any of your questions in that other post, feel free to comment on either post and we’ll try our best to help.
Best of luck with your project,
Grace