like the shipyard idea, and the idea of using disk blueprints to create them, and to make it far more interesting, maybe find bootleg blueprints at pirate bases... with a rare chance of actually being perfect, but it could have defects (missing groups of blocks, perhaps only a shell of a group...) "explosive" defects... or just the wrong ship entirely... and make it difficult to tell the false ones from the real ones. not impossible, but hard. just imagine the first time someone buys that "cheap" battleship and it blows in their face.