[Arkcon]

A good one would be some sort of super engine -- mabye 24 movement points, that had a kt such that it almost completely filled a ship. Yes, it's a blantant ripoff of Larry Niven's Quantum IV hyperdrive.

But then there's a balance problem -- how big should it be. If you needed a baseship, then you'd be waiting forever to use it, making it useless. But if it were smaller, you could build a fleet around them.