Hydromancerx
C2C Modder
I think personally that Tanks should only be something you need to manufacture through the Modern era or so, because after that you have a mix of tanks, hovercraft, and walkers in most units.
Don't the mechs need the mech factory to be made?
Also I wanted to make an Artillery Yard that produces an Artillery resource. Note this would be a step up from the Siege Workshop and Cannon Forge which require the units to be built only in the city that has them rather than anywhere the resource is present.