- fixed an issue with the explosive barrel of the text signs exploding if a mod apply the core texture to it (increasing hitbox size)

- removed a single invisible ground node (destroying ships passing by), placed by missclick.

- removed "Suspendium Altitude Controller" from default ships (it wasn't working if not built during game)

Removed built-in mod requirement, now allowing the user to choose between Flying forts and Fortships.
Added another mod explaining some basis to the players (IG text).