The Gobsmasha is a classic orky design. That big boxy body, huge gun and clunky manufacture all scream ORKS. However I've never liked the big wheels. Also, I've always loved Leman Russes without turrets. They just look so primative, so much like Mk I tanks or something of a similar vintage. Hence, when it came to designing my basic Russes for my Armoured Company, I decided that a Gobsmasha with Russ tracks would be my archetype.
Full post & pic: http://imperialgrots.blogspot.com/2010/06/converting-painting-leman-russ.html