So in general building factories on planets are pretty lame seeing as you mostly need more than one item to craft up stuff like CPU's, Industrial Motherboards, Components, Lasers, etc.

What if a system is implemented whereby you can connect your planets, much like the labs can be connected, but of course only the planets you personally own. Doing so you would then be able to tell one planet to produce Industrial Motherboards for example, by connecting it to a planet that produces 30nm circuits, another planet that produces 20nm circuits, and a third planet that produces gold bars. Once there are enough components on each of those other planets it is transferred to the planet that will then use it to produce an Industrial Motherboard.