I would like you to either add Orange and Black Trains to unlock or coordinate the train line colors with the color mode.
Orange: I desperately want Orange trains so that I can match them to the shape loaders. Therefore, the Orange lines deliver shapes and the Blue lines deliver paints.
Black: You added White trains, but in CMYK mode Black is actually the next color.
Overall, I think the cleanest option would be to tie the train (and trader colors too, please, esp. for CMYK - Black makes White?) to the color mode, but nine train lines would be great!