M338 and M337 hosted 2 rare consists today in Iowa. These 1st 3 units brought M337 into Waterloo around 2pm, and now are serviced on outbound M338 at sunset. IC 6107, CN 5369, IC 1021 made for a nice M337 consist inbound, but throw on GTW 5848 and GTW 4623 and you have a nice unusually consist for 338 out of Waterloo. 5 standard cab EMD's!