Those diesels look like extremely well used and very rarely washed units! Just like the prototypes! I did get to work on a couple of ex-Rock units in the past, they had become EMD Leaser units. And even after EMD cleaned and painted, the innards were just filthy. And some of the paint didn't stick so well. Evidence of a road in heavy financial straights, as they were. Again, kudo's on the appearance!!!