I love this design, such a cool ship, and a great episode of the original series.
Some co-workers of mine used to laugh at the thought of what the "mirror universe" Khan must be like. We determined he's a complete and total wimp and whiney baby, with a fake goat-tee (mirror universe standard). Pretty funny when you think about it.
Sorry to go OT for a bit, but REL that is a beautiful buildup, perfect job! It really looks the part!