Lol. Yes, there sure were a few. Flat wheel generally occur in yards with hand brakes left on and dragged, or from a train being in emergency. Watched a train from CSX roll by once when I was on a local that hit someone and almost every wheel on the train had flat spots and they were all in the same spot. Strangest sound you could ever hear.
And yea we run single stacks east of Ayer because of clearances. There are a decent number of bridges that barely clear a excess height boxcar.
So right now the East Deerfield and Ayer trains are being combined in Ayer or Portland to make MONSTER trains. I have my theories, but wont say publicly.