Just an idea, what if when you demolish mission artifacts, they turn into a sort of one time use blueprint, which costs a ton of credits and CTP to build again.... The blueprints would not take up any space. This would be especially helpful for the not-so-great artifacts like the confinement chambers. Cus when they are already installed, the only way to get rid of them is to demolish again, and they would become useful at a higher rank