Daniel, I'm glad you posted the RS3 elsewhere. It led me to this post. You've done some really great work. I've seen the PRR Hammerhead RS3 but I've never seen a Hammerhead Train Master. I'm staring at a Williams Great Northern Train Master that may be a candidate. Simple Orange paint scheme with a green roof. Just what I need, another project.
I also like the elephant ears on 6153. I've got a MTH RK NYC Mohawk that I've thought about adding them too. Did 6153 come with them? Did you add them? Are they homemade?