Hi Tim ... I seem to be behind with your thread ...
that's a smashing shot for Whole, the bright red of the wagon and the focus work together perfectly.
Difficult to choose for Structure, I think the signal is more a traditional interpretation of the theme, but those bright green railings are very eye catching, especially with the super shiny train behind them.
Whole ...eeeek another difficult choice, I love the close up, it gives off such a huge feeling of power and size, but the second one is so appealing with the steam and the man, probably for the theme I should choose that one.