Steampunk Protostar, Part 4

A couple of weeks ago, I worked up a concept sketch of how I envisioned the Steampunk Protostar would look.  This image was originally posted on one of the forums, so I deem it necessary that it should also be included in this build series.
The drawing does not include all of the details that will eventually make their way onto the model, but it gives a general idea of the overall look.