So I'm looking to add some more protection to my JKU and after seeing a diff skid in action this past weekend at Rausch Creek I decided to look at some and the Rancho RockGear ones caught my eye. Anyone have any experience with these? I am just looking for that little extra protection for now - not going to replace the diff covers just yet. Being as that may are they worth getting without an upgraded diff cover? Besides these I looked at the Four X Doctor ones but at least the Ranchos are designed to slide more rather than just for impact purposes. Opinions?