I've been working on the aft details. I've also started on the engine. I'll just model one then make three copies.
As far as scale I was really debating between one and two decks. However I really wanted to have a small crew of about five for it's regular use as a cargo ship. Also based on the how cramped my S.S. Enterprise is (almost 100 years later) I felt this ship needed to really be cramped. Lastly there is what seems to be a window on the Greg Jein model command section. All of this information is how I arrived at the scale I did. I think having such a small ship out there in the great void of space would really help give a sense of isolation and wonder.
My approximate scale: