Hi Lowie, Ill try to answer all you questions
1... The X11 chassis to my knowledge is no lower than that on the X10, the steering rod goes over the chassis instead of through it to make the chassis more rigid as rowan said, i guess it all helps to eliminate the chance of shortin batteries but im pretty sure that wasnt the sole reason of moveing it..
2... The team are currently working on a new chassis layout and have been for sometime as far as i know, this is to accept stick pack lipos as far as im aware. Im not sure if a new chassis has been designed as of yet or if the prototypes are just using a normal X11 chassis that has then been modified to fit...
Hope that helps? If you need more info, either phone team xtreme directly and speak to Lewis or Yanina, failing that PM Nathan on here, he'll know everything
Any more questions, feel free to ask,
Tom