[Suicide Junkie]

It seems to me that the propulsion lasers would be best made in the same style as the Crystalline Tech "Energy Lens" Shield facility.

Build the facility on a planet, and all ships in the system get +1 movement.
This could potentially allow you to recover immobile ships without sending in a repair ship.

Alternatively, you could reduce the effect to be +1 movement for all ships in that sector. It would effectively be a catapult launching system, which allows your base to launch interceptor ships faster/farther than normal.