22K has not been filleted at Mechanicville for the past year or more. Rather, it departs Chicago in single stacked configuration. So far, only a single 22K has detoured over CSX on its way to Worcester/Ayer and it was conventionally single stacked. As it did not pass through NS Bison Yard Buffalo or Mechanicville, the detoured 22K didn't have loaded autoracks either. After this one detour, NS annulled 22K for about 4 days. As of Sunday 2/16/20, a single stacked 22K is heading east on NS led appropriately by New York Central heritage unit NS1066. I'm guessing this 22K-16 will detour via CSX from BUffalo to Worcester but perhaps not.