@1cctlives - Yes, that is interesting about the letters. It may signify that they won't be doing any wholesale patching of the fleet to CPKC reporting marks for the time being, which makes sense from a cost savings point of view. Also, they have two decent paint schemes to mix around the continent which look good together, so maybe the KCS power will remain pure until repainted. Southern had already done the sub-lettering on the cabs with SOU, CNOTP and whatnot, and of course NS also maintained the practice for a while.