As the Republic of New Catalonia gained power and influence, they realized they needed a vehicle to carry out city bombardments. The 'Cassowary' fit that description.
About this creation
From this angle you can see the small side-mounted cannon, as well as the hardpoint on the other side that can fit another gun. This loadout only has one gun, however.
From this angle, you can see the cockpit opened. The sides also need to be opened to fit a figure in, however. The R&D corps is currently prototyping a lighter mobile artillery piece.
This is one of my favorite minifigure scale builds from the New Catalan Army. It's currently my smallest vehicle to fit a minifigure. Although I'm not totally sold on how the top of the body turned out, I think it worked pretty well.