[Suicide Junkie]

Hey, guys, if you want a mount for shields and engines, use a weapon mount with a "weapon type" of "none".

You can't restrict the mount to engines or shields specifically, but you could make the components smaller with an increased cost, then have 6 mini shields rather than 4 fullsize.

When component restrictions become available, you could have engines that are only legal on one size of ship, so you could have "Escort Engines" vs "Dreadnaught Engines", the latter being bigger, slower and more expensive (or whatever you feel like).