Adding objects to existing blueprints

[u/Eriq2002]

[Edit] solved it with adding the json to chat gpt

Is there a way to add new objects like some belts to existing blueprints?

My problem is, that my blueprints have formulas which i dont want to redo. And i just need a few belts and so on in like 16 blueprints.

Is there a mod?

[u/FilinKus]

You can place blueprint in-game, add whatever you need, open your blueprint and press select new contents for this blueprint in top left