Peter Reid's "LL-142" spaceship model works on two levels, both as an ornately finished model with nary a smooth surface to be found* (almost too much so) and as a tribute to the old LEGO Space themes, completely with blue-and-grey color scheme. The cockpit is an "X-Pod," which were actually sold as carrying cases for small sets of LEGO but also had a simple 2x2 stud array at the top that made it possible to incorporate them into designs. They're somewhat highly sought after these days. Peter's LL-142 Photostream [Flickr via Bros. Brick] * This is known in the LEGO modelling community as "greebling."