I plan on buying a 2017 XF Cross Country Limited in a day or so and was thinking about swapping the track to a 1.6 cobra from the 1.75 Backcountry X. I roughly ride 70% trail and 30% off trail but want the best of both worlds obviously. Also, is it a good idea to stud a 1.6 Cobra track? As of now I am going with the 8000 motor but seriously contemplating a 9000 but only reason keeping me from the 9000 is being too heavy off trail.