Downloaded so many huge ships from here, but inable to modify them due to too small building range. So how those guys build so very big ships, and how I can do this?
There's a mod that in the game by default. It's called "huge ships" or something similar. You can navigate into mods on the main menu, then click the little power icon by the mod you want on.
at the bottom of the menu screen there is a mods button if u press it a window will show make sure the big ships is marked green then restart the game
Additionally you can modify the mod.txt of the huge ships mod for an even larger grid, if you so need. Its rather simple.