I need a base to mount my big guns to, something Orky and ready to go. To this end I actually want 2 mounts. A vehicle mount, and a stationary mount, maybe a building rooftop. I am going to use a can lid for my swivel base. I am also going to modify the Kannon and the Satellite dish to mount properly onto the can lid with magnets.
From the can lid I took a piece of trukk chassis I had lying around. I added to this a piece from the imperial city box and then some kebob sticks to mount my smaller tank rollers on. The large roller has a smaller roller glued into it and is mounted to the end of the corner piece from the city box. a couple of wires and it should make a good looking small motor.
After this I needed to figure out how high everything had to be to keep from dragging on the ground. I decided I wanted a platform under the guns for reloading that would turn with the gun, so I had to go even higher. The top tube ended up being 2 1/2 inches tall.
I want this to be able to lift, or at least appear to lift into an anti-air position, so having some sort of lift mechanism is a must. I chose to go with a pneumatic cylinder, pictured above. when the cylinder is connected it will be completely closed in a horizontal gun position, and completely extended, pressed against the holding tube in the top right for a vertical shot.