Plastic chassis would be same design as the standard one I'd guess, it'd just be more flexible than the composite kit chassis...
Would give a different feel to the car, my guess would be more forgiving/smoother on rougher surfaces? I'm sure one of the X-factory guys would have a better and more detailed answer to that though.
Sounds interesting, but my timing could be better...as I've just ordered a new chassis this morning (thanks to a pretty brutal crash on Friday eve that took the front clean off


), might have opted for that instead of the standard one to try it out!
Just hope the new one arrives in time for Kiddy this weeekend...hopefully DMS have that in hand, they usually do