I have just fitted a set of Kings Super Low springs and not very happy with the result for the rear.They only dropped about 10mm.The front dropped great and very happy there.Could this be because I'm using gas shocks and holding up the rear a bit.Or is 10mm drop normal for those springs?They have been fitted correctly and are seated properly.Part # for rear is KCRL-46 and KCFL-36SL for front.