This took me about 20 hours to complete. Ya, that was actually a trial and error. Originally, it was to be a hole in a wall, but sadly, i was running out of boxes, so I compromised, and moved the two top single boxes down so they rested on the base of the X. And you're welcome, I think more people should start doing something like that, makes a map easier to understand.
After playing this over and over I started to get bugged by the mancannons and all of the fusion coils.