Check out JY’s explanation breaking down the passage for PT 42, Section3, Passage 4. He shows how crucial it is to be able to visualize. It is a great passage to hit hard for review!
I'm not sure if this is a loophole but I can get to RC explanations via the Logic Games page. For example:
http://7sage.com/lsat_explanations/lsat-1-section-2-game-1/