I am currently making a mod that changes fabricators to stationary and buildable by other fabs and reach vision range. To expand, you need to build your base to expand in the desired area. To proxy, you need to establish a transport (fabricators are still transportable). This includes air, as akward as that sounds, you will need to pelican an air fabber to an area to build air things. This includes orbital, as akward as that sounds, you will need to astraeus an orbital fabber or other fabber to establish another planet. This also indirectly nerfs teleporters, as more steps are required to simply "get a fabber through a teleporter". Combat Fabbers are up in the air, might just be "assist towers" or "assist units" as they would be different and linked to bot tech. I am posting this via mobile during blackout, will get basic function up asap.