I had a X2 Buggy in my hands last Saturday, he said it would be a couple of months and there is no conversion kit for the X1X
They changed it so much that only the arms, diff housings and wing stay will be the same as the X1X.
The one I looked at had the alum. drivelines in it too.
You cant even buy the chassis and put it in X1X because of the shortened radio tray, you have to run a small center diff gear and the X2 Truggy ring and pinions. The rear hubs are all the way forward now and not all the way back and the chassis is lenthened 8mm out the rear. New fuel tank design, etc, etc. If you want to know more about it I can post some more but this book is long enough right now.