More progress. I can place the FCC and radars now and connect them all to the turrets. Plus, they show up on the FCC UI now as well.
However, how, once I travel to another planet and medium asteroids start spawning, it crashes again.
Error while running event dart::on_nth_tick(60)
__dart__/scripts/dart.lua:206:attempt to index field 'first_signal' (a nil value)
https://i.imgur.com/zYPj0or.png
It is also worth noting, it looks like the turrets were shotting at an out-of-range asteroid (one that would not hit the ship). Kind of hard to see it because if I click confirm, it will close my save, but best I can get:
https://i.imgur.com/xMD9YyS.png