What is availability of Sportsmen models with 4 wheel engine braking? Have there been any published reports? Appears that Dirt Wheels did not include the 4WD engine braking model in recent comparison test of 650/700 machines. If running in All Wheel Drive does the 4WD engine braking turn on automatically? I was wondering just how this feature gets turned on and off and how well overall the feature works. I went to Polaris dealer today and they seemed to be guessing at all this. Thanks.