Great builds and love the finished effects of paint and weathering. The only thing that struck me as odd was how the crew would see out of those rounded shields. After looking at photos of some real ones it looks like the shields on yours are on incorrectly as it looks like there are supposed to be vision slits in the front of the shields, It looks like yours may be on the top.
http://en.wikipedia.org/wiki/File:20080429_2231_edited.jpg
I must admit the first time I ever heard of one of these unique vehicles was from this thread so I am definitely no expert. All in all you did an excellent job.