So I am building an Only War campaign centered around hunting down Ambulls in the corridors of a space ship. For those wondering an Ambull is:
http://wh40k.lexicanum.com/wiki/Ambull
I have most of the models and the board is under construction but the issue still remains on how to do the Ambull itself, though the model is still floating around on ebay I am wondering what the best way to build/convert an Ambull could be.
I am going more for this look than the original: