[Suicide Junkie]

You've got the 6-SpaceYard Starbase:
12,000 KT of ship building power per turn. Millions of fighters, or baseships every turn.

And the 25 movement point baseship.

But what else?
Aside from engines & spaceyards, I can't think of anything that would be useful.

Giving a neutral race some modded ultra-special racial tech would be good though. Keep 'em valuable throughout the game as a trading partner.