I built this for my old Sisters of Battle army for WH40k... Although I haven't really played the game in some time I figured I would put this up as I was using this to proxy for a Soviet walker using the Gear Krieg rules.
My Sisters of Battle were actually a rebel group opposed to the unjust ruler of the Imperium called the Communities in Solidarity, thus the CS designation. The CS actually consisted of more than just sisters, there is a space marine chapter (formerly the rainbow warriors), an Eldar chapter, a Guard chapter, and a couple of Tau chapters. Yay to the people, woe to the power mongers!