The Screws sound fun, but you know what would be great? Two things, actually. The first would be a single-track with sidemounted wheels module, similar to the OTL Vezdekhod's system. The central track is for speed and the wheels turning; the turning circle would be pretty bad, but it's still a very neat thing. The other, if it's possible within the code, would be a track which can be switched via action group or what have you into wheels. An OTL example would be the Soviet Christie suspension, which allowed one to remove the tracks and use the vehicle on the road as if it were a car.
