[Suicide Junkie]

The "on use" part of the destroyed on use, is the USE COMPONENT command on the main screen, correct.

Repair drones are a bit micromanagey, but can do a lot of nifty things.
Put engines on them, and you can fly them to the scene of a warppoint battle to help clean up the mess.
They also represent a cost to repair, since they must be built, and cannot be recovered.

They can also make for "Emergency repairs"
For example, if you have 5 damage, and you have lots of drones with 1 repair point and a lifetime of 5 turns, you could:
- Spend 1 drone, and finish repairs in 5 turns
- Spend 5 drones, and finish repairs now, while wasting 20 points of repair ability.