This was done for the Black Widow Company (a fellow SM player group) in WH40k - Eternal Crusade. They requested a kick-ass battle scene between an SM walker and a huge Tyranid. Well, while I love Dreadnoughts, they are not quite the biggest thing

So, I picked up one of the amazing Imperial Knight models and paired it up with a big Mawloc ^^ (they are technically in the same size category) The IK is slightly different, custom built (both the "helmet" and the weaponry)

Since its about SMs, I could not resist and put in a crapton of drop pods to signal the incoming crusade.