This design's evolution:
About twenty years ago I adapted one of MJ's sketches to design this.
Then some years ago (about five or so) I used Photoshop to fashion this, a slicker version of the previous design.
And now we are at my present stage which I will model in 3D. It's essentially the same thing, but at each stage I simply tried to improve on what I did before. The Photoshop version was a try at fixing things I felt I could do better than before and the 3D model will be a further refinement. One could make a case for it being the same class ship showing evolution in design over time. The Photoshop version is obviously closer to the final form although there obviously will be differences. And having a 3D model will make it much easier to view the ship from any angle.