Had some Extra Bits laying around, a top of a Zzap gun, and old dozer blade from something, some old rhino bitz, for the main body and the tracks i used the old 3rd edition Ork Wartrakk pieces, to make my very own Grot Tank, with the new IA8, these things are awesome! and in regular game play i can just substitute this tank for a Big Gunz krew, i dont think anyone would mind, I added a Nob in the First picture to show size of the tank, The cool thing is i have enough old wartrak pieces to make 2 or 3 more of these grot tanks. I may have to pick up some plasti-card to add some extra ork bitz, but we'll see