Fascinating and inspirational stuff Kevin
Thanks for taking the time to post all the photos and write up. Totally agree with the horn grill comment - changing those to the tech version makes a huge difference to a loco. 37’s, 40’s as well has 50’s benefit form this mod.
Even painting the 50’s marker lights white and running a fine black marker around the lip of lights to represent the black rubber makes a big difference.
I like your decision to go for the earlier paint job that has yellow strip above the windows!
Many thanks
Ajax