The thing that has always concerned me about used suspension and steering parts, is what they went through in their former life.... If the donor is intact and shows no sign of major hits or tumbles, should be ok. My other reason is the Borgeson (and others) U-Joints, and the new double U-Joint are just so clean looking compared to the clunky OEM parts, and those needle bearings in the joints make for silky smooth steering.....