I'm just replacing my beaten to death original shocks for adjustables and find that the jaws of the rear support rail are too narrow and need opening out to accept the new ones. Do I need to widen them enough for washers between the jaws and the new top bushes or just enough to clamp the supports onto the replacements without using washers between the faces? Can I also add that the Knowledgebase is the best thing since sliced bread.. Chris