Allows building of much bigger Gravships
Grav engine build-in range: 18.9 -> 37.9
Grav engine build-in tile limit: 500 -> 1000
Grav field extender range: 16.9 -> 32.9
Grav field extender tile limit (per extender): 250 -> 500
Grav field extender limit: 6 -> 10
Small thruster limit: 4 -> 8
Large thruster limit: 6 -> 12
Fuel Optimizer limit: 2 -> 4
Fuel Optimizer efficency: 0.3 -> 0.2 (min 4 fuel per tile -> min 2 fuel per tile)
Gravship Shield Generator range: 24.9 -> 39.9
Gravship Shield Generator limit: 2 -> 4
