This marvellous Mekboy Junka conversion was part of the Ork Shanty Town display that Forge World had at GamesDay 2010.
It has an Ork Looted Rhino at the heart of the conversion.
With a Deff Rolla at the front.
The Imperial Moisture Condensor as a fuel tank was an inspired move. This is what it looks like as a condensor!
The rules for the Mekboy Junka are in Volume 8 of Imperial Armour (ie the Orky one).