If you could possibly destroy these by damaging them, that would be great for my server too.
Totally possible.
This seems like a really cool mod. I'd probably get it if it's released. Also, making a way to save new structures would be cool, too.
Structures are made with code, not by players. Much like the actual game, Survival 303/404, the structures are stored in the Lighting category. Here, they are pure code, making them a pain to make. I made a small tool to quickly make them but it is very hard to get used to it.
I'm currently having issues with the brick planting though. I'm at a gas station so hosting wouldn't be such a bright idea.