In this photograph you can see the hollow cavities used to house the suspension components just as with the original prototype.  You can also see the body platform leveling spring devices.  As with all of our models, the drivers are brass alloy cast centers with pressed on and insulated stainless alloy tires.  All tire surfaces are insulated throughout the model so that the body and frames run neutral to eliminate shorting, this is more costly and more work, but the best way to approach the construction.