Hull for Modular Vehicles

I am developing an Australian Defence Force in the future.

The first is a modular armoured vehicle.

Starting with the Hull pack with three options - Hover, Tracked and Wheeled

All future will be modules that will fit onto these hulls.

Base Hulls available at - 
Anti Air Module available at - 
Artillery Module available at - 
Infantry Support Module available at 
Missile Module available at - 
Tank Module available at - 
Troop Carrier module available at -