Take the chassis of the Guntunk, englarge it. Stick a capital ship's gun turret on top of it, and you have the Type-79 Super tank. Employing 3 x 500mm guns, the Super tank can supply artillery support from over 100miles away.

Okay, it's big, notice the size relation to the guntank. But it's always occured to me that the federation could use some ridiculous-sized Mobile Armor types. Actually the super tank is not that big if you compare it to the fed's Big-Tray hover monster. Notice, the super tank's camo scheme was taken from the Big-tray.

I've just always loved tanks, and couldn't resist drawing another one.