Did the BN line ever run their green E9's in AB or ABA configuration on the commuter lines?
I can find a couple photos online of AA running elephant style, but other than one photo that is captioned something like "excursion train" I don't see any B units ever, and mostly just one A unit pulling four to eight gallery cars.
Did they double up the A units when the trains were longer? And were they always elephant style (I guess to better run in push-pull?) or did they ever run back to back?