OK, I've been lurking in here a while now; and I finally decided to comment.
1... The Hull is Great overall; but the top section could have the bulkheads re-done to allow for second teir option later on (seriously, it wouldn't be that much work compared to what you have done already).
2... I love the inside detail work... well done all around.
3... Magnetic Ramp is a great idea, and hinges are the way to go...
4... Did I see a Plastic Card Tank or two inside there for size reference.. If so, then good for you... as GW does not need to sell any more tanks. LoL
5... Is this thing ever going to get done... started last year, and even at my speed, thats slow... Oh and when do you think that you will unleash it on the Locals ? seriously... get it done, the look on their faces will be worth it.
Overall... Awesome, and I don't even like IG...
CaHG