Firstly I'll introduce myself. I'm one of the art team over at RS.com Towers. I was responsible for the creation of the Dash9 units.
And I am now starting work on the SD70ACe.
In the past, we've found it very useful to keep the community involved right from an early stage, when modelling a locomotive. With that in mind, I'll aim to keep posting with updates on the model, to keep you all up-to-date with the progress.
Feel free to comment on the progress :)

Regards,
RSGray