Thanks. That's how I was going to use it, so it does follow the behaviour I expected (as well as making the code for the mod much simpler.)

I would like to ask what does the "position" parameter of the LuaSurface::find_entities_filtered method actually does in the following cases:
-There is a position AND an area present in the table
-There is ONLY a position present in the table (this is the most important as I need to find all ...

My proposal for the addition of blueprint custom data would be like so:

Ghost entities have two new fields blueprint_id and blueprint_entity_id
Blueprint data can not only be accessed via the item, but created blueprints can be accessed through a game.blueprint_data This is a table mapping ...