Hi sorry about not introducing myself. I am a robotics/pre-engineering teacher in Las Vegas, NV. Originally from Maui, HI :) I use the Mindstorms NXT robotis, We are now focusing on city planning. Some of my advanced students built the emerald night train and tracks.
As far as the train goes I used the PF XL motor, have not disconnected it yet (I will try that now), I can manually turn the wheels. It does look like the wheels are 45 degrees.
Thanks for the advice!