I have a new 600 xc sp, and the track is a bit strange. The center of the track has a lug every third tread. Not sure where to start my stud pattern. i am putting 144 studs on sled. Does the stud pattern interior start immediately behind the lug? Does not seem to make much sense to have these studs hanging out in the area with no lugs. I am worried about ripping track. thoughts? Web sights?