Caption: These were interesting times for Railfaning the GEXR. A number of newly built SD70ACE’s built in London, Ontario were briefly tested over the Goderich Exeter, between London and Stratford as well as some runs into Toronto. A number of CSX SD70ACE’s made the trip to Toronto as well as at least on CN SD70M-2. There probably was a number of others I may have missed, as I photographed a few UP units in Stratford as well. Here a pair of new CSX units lead GEXR train 531 east of Acton with a buffer car behind the power. The train has just begun to tackle the Niagara escarpment. From what I was told after the CSX units left Canada the headed to the Montana Railink for testing before finally making it to CSX. Unfortunately they never seemed to be a good fit for CSX and have since been returned to Progress Rail and some sold to other railroads.