I wasn't sure where to post this so I'll do it here.
In collaboration with the basebuilder mod's creator Tirant, I'm planning my new map which will include a feature we are discussing right now. Tirant is already working on a radical update to the basebuilder plugin and he just started testing how he can incorporate my idea in the code. If all goes well, the map will be made with the new plugin feature and will be shipped together with the plugin update. Unfortunately, there's no estimated date for that right now.