Spent quite a few hours making The Castle my main settlement last couple of nights. Pretty happy with the end result.
Main wall is guarded by 6 turrets and a guard post
Decided not to have a junk gate (too small). So designed something i like to call the gauntlet - a main entrance that is 3 cement blocks high and 3 deep. An open longer chokepoint guarded by 3 heavy laser turrets and 3 heavy machine gun turrets.
The top level i have 2 green footlockers with cryo mines and grenades. Should any mobs make it to the guantlet and face the 6 turrets it would be nice to freeze them in place

I used rails on the edges so i dont accidentally fall off. Also had to use sleeping bags to cover the gap between the cement pillars and the wooden platform.
Platform frame has 4 generators, and 12 ladders which i tried to make symmetrical - even with the wires. Got a bit OCD towards the end of construction.
Rear wall is less exciting, just a simple guard post and 3 turrets, but its a much smaller path so hopefully thats enough
Should they make it to the rear door, the narrow room leading into the castle has 4 shotgun turrets inside...
I blocked off the 2 damaged side walls of the castle, but only on the outside. I like how the inside crumbled section acts as a natural staircase giving me access to the top
Started to run out of materials at this point. Copper, aluminium and even ceramic were depleted. Got 1 more idea that i would like to implement and will post the results if it works. Havent doen any questing for a few days now