Progress up until the point you are allied with the Prydwen. You can pickpocket a fusion core from one the Knights inside the ship (make sure you do not get caught). Once you pickpocket the fusion core from the Knight, he/she will come out of the Powersuit, replenish their fusion core and re-enter the powersuit. Once they are inside their powersuit again, pickpocket the fusion core and repeat. (be sure to quicksave after each successful attempt)
Step1: Find a knight in a secluded area.
Step2: Pickpocket the fusion core
Step3: If successfull, quicksave (just incase)
Step4: Wait for him to leave his powersuit and go back in it
Step5: Repeat Step1-4
Unlimited settlement size
While at a settlement, drop all your extra weapons on the ground.
Enter workshop mode, and click to store those weapons in workbench.
This will trick the game into thinking it has more space and you will see your size actually drop.
Just go back to your workbench and add them back to your personal inventory and repeat the steps again until you have enough space to build more.
Raw Resource Duplication – Works as of Feb 2018 (Xbox One)
1. Drop the desired item on the floor near any work bench you have access too (must be a base resource e.g. adhesive, cork or steel etc.). 2. Go into workshop build mode and highlight item that you dropped. 3. Press X then quickly hold B 4. While holding B, Double tap X then press A. 5. The item will of doubled and both parts added to the workbench.
This works with stacked items too – If you drop 100 glass – Follow steps 2 to 4, you will have 200 glass in the workbench.