i recently purchased a set of integy piggyback shocks for my jato, i am unsure how to set them up with the little white discs. which for front and which for back? i went ahead with the install and the rear of the car was sitting lower than the front so i ran the retainer ring down to stiffin them up and am still not happy with the out come. the shaft lenght is 81mm, what should i do? the car bottoms out, the factory shocks were better.