not per ship. Look into his other topic. I posted there how.

Like putting one stand alone comsat in a corner of the map, maybe two. When there is an EB floating above the Satellite (because someone took the planet it belongs to over), the ComSat changes to their color and they can then use it. Otherwise I planned to make ComSat's unbuildable.

My biggest problem right now is getting these Engineering Bay's to appear in transit / lifted over the smaller locations (which represent planet ownership on the 'galactic map')

I keep getting the unplaceable error.

Lifted buildings can only be created on buildable ground.

Create it somewhere where you will always have buildable ground and enough space and move it to the location after creating.

for a trigger once someone captures it:

Create one EB with properties in transit at transfer (location with buildable ground)
Move 1 EB at transfer to Platform A

Check post #12 in this topic (my first post) I already explained there how to do it.

I also covered that already. Also check post #12

The simplest you can do is not putting them in the corners but "on" the planets (on the large platforms). Make them invincible and for P12(neutral). Then the trigger that takes over enemy planets (check post 12) takes the comsat too.
For the first trigger "Creating an EB for a newly conquered planet" add 1 action that gives the player the comsat from P12.

btw. comsats have nothing to do with doodads. It's an extension. I think you mix up some words here.
I also noticed that in your initial post when talking about "The smaller platform would have just enough room for a doodad to be placed". You cannot place doodads by triggers. I think here too you mean some type of extension (2x2 building add-on), right?

Doodads are things to make your map more beautiful like trees and rocks, but also bridges and ramps.