Hi Adrian ,i think you are correct , the shock is there is no bounce in the deck when you fit the pylons as rubber o rings will not bounce , they are meant as a shock absorber ,not to retain the bounce of the springs, he has noted in the message the wow has gone down to the std springs, to 1% using the app on his iphone , well all i have are ears ,i did not do a graph they either work or they dont , in this case they do, by a country mile, now that was the surprise ,,