I highly highly highly recommend getting the game and playing it for yourself, it is such an awesome experience. It scales up nicely for an old game....
Anytime i had idle engineers, i set them to patrol the fabrication area and support my factories, or to assist my commander or subcommanders.
The last game that i remember making effective use of this concept was a game way long a go called Metal Fatigue and you could build on the planet...
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