Dear Virgil, I'm sorry if I'm the spelling police, but this just caught my eye and I thought you'd like to know about small misteaks[sic] in your game.
If one clicks on a drone, the descriptive text that comes up says:
Drone Base
Powerful drone bomber. Good for air to ground support. Must be manually targetted (http://www.future-perfect.co.uk/grammartips/grammar-tip-targetted-targeted.asp).
Doh!
Thanks...