The Calculus (Beta 1)

This is my second ET map, I've been working on it for 3 maybe 4 months on and off. (I work slow) Comments are always appreciated.
Objectives ========== Allies ------ -Escort the train to the flatcar with the paitings, then get the train back to the truck -Use the track switch to get the train on the right track and to the paintings -Steal the manifest of stolen pain