I have been annoyed with being unable to craft some of the items the game uses in a constructor. I understand that the Devs want to limit what players have access to. So I was racking my brain, trying to figure out how to make these items craft-able. But also keep balance. Then it hit me, it's an old solution but I hope it's one the Devs will consider. Unlock advanced crafting recipes by finding the item, then teaching the constructor how to make them. Some items unlock by leveling and selecting them in the skill tree, others by finding them and teaching the constructor how to make them. Submitted for the Devs consideration.