Could someone please explain the differences in the Rubicons new rear driveshaft and the aftermarket kinds. I understand that the Rubi has a slip yoke eliminator and a longer driveshaft than the regular TJ but I dont fully understand the CV stuff. I see a lot of you are talking about getting a CV when you lift the Rubi. At what height would that be needed? I know each is built a tad different but an estimate would be nice. Oh and I thought that when adding lift the point of a SYE was to have the longer shaft to cut down on driveline angle. With the Rubi set up wouldnt that take care of any driveline vibes at 3-4" lifts?