Got it, built in in 2 evenings, stuck it on a shelf and got back to my regular modeling. It's a great little distraction and finishes of as a truly beautiful display piece. The lighting system is ingenious, the part-to-part engineering on the whole kit nothing short of brilliant, and the prepaint awesome. Accuracy is light years better than any other Enterprise kit out there.
I had a little difficulty getting the saucer rim pieces seated all the way. More pressure, I guess. The nacelles pylons fit a bit too snugly into the 2ndary hull, so a bit of sanding may be needed. The nacelles don't snap together well along their bottoms, so some glue may ne needed there. Otherwise, no problems.
The light bulbs are encased in specially shaped clear housing to fit into the light transmission parts. I doubt there's any point in replacing them with LEDs - You'd need 1/4" dia x 3/4" LEDs to fit, and the damn thing is bright enough to read by anyway! The kit really needs nothing to be changed or substituted, it's pretty much perfect. All the parts have overlapping grooved edges, so if you put it togtether right there will be NO light leaks.
No reason in the world the purists out there couldn't use the kit to build anyway they want - strip it, paint it your way, get JTGraphics to make you some decals. I may even do that myself with a second kit.