Yes, you're right, it is the Romulan D'Deridex Warbird which is now my next project. Already the complexity of this design has made it's impact; I've had to use every last bit of modelling know-how that I've accumulated over the last few years to just model the head section and wings - there's been a lot of vertex modelling here, nothing as simple as a Fed ship - it's definately going to be a challenge. Also, if anyone finds some high-res close-ups of the warbird model, that'd by extremely useful (I've found loads of mid-res shots of the whole thing - but most of the detailing can't be made out).
A little more to show now, I'm working on connecting the head section to the wings (with varying degress of success):