Hi Scott,
Thanks for your kind comments -- glad you're enjoying the route.
We'll investigate the brake detents for the GP9s. I can't say more because I don't know more at this point -- other than that I could replicate what you wrote in my own sim.
With regards to repaints, I think standard DTG repaint policy applies in absence of any specific rules in the product manual (there are none in ours). So basically what Buzz wrote above. Please feel free to contact me directly if you have any questions about the models I've built for the route.
And on a personal note: weathering is a bit of a conundrum for me. Personally, I would love to do much more with it, but then the more weathered, dirty and run-down your models look, the harder it will be to get them through licensing (and many RRs want to inspect and approve every single model you've built with their logo on).
Cheers,
Michael