Steam Powered Vehicle Concepts

So I did some technical line drawings with the theme of steam powered vehicles in mind. Loaded up a bunch of images from Google and began concepting. I want to become really good at painting in Photoshop however, I think it will be good to develop my line drawing skills at the same time. I have been trying to find ways to present my work to have a  professional look, so I did some research and I really like the way Feng Zhu presents his designs. So I took direction from him to try and make the presentation of these sketches better.