I was on a trip a few years ago with Willie Worthy, the tech writer for one of the 4WD magazines. He had the sliding mount on the front of his Jeep. He told me that he got the idea from the circle track folks, who use them to keep suspension angles from changing as the suspension moves through its travel. But he also pointed out that the biggest shortcoming is that they don't allow for much suspension droop. /forums/images/graemlins/shocked.gif Since there is no shackle to allow one end of the spring to drop with the wheel, articulation is extremely limited. /forums/images/graemlins/frown.gif