I have had this setup on my ARP4 for 3 years or so now, after contacting Peter Ballard who I believe may have thought up this design. I initially found the ride choppy although do not remember it bottoming out. Peter sourced the short springs and some shorter main springs which I then fitted.
The ride immediately improved, as per Richards report, however I was having problems with bottoming out when fully laden with passenger and luggage. Having screwed the spring seats to the top of their travel and set the damping slightly harder when touring laden, this has largely been eliminated except on the worst of bumps. I think a slightly longer spring would really be called for, which would lift the rear of the car a little more, this is probably what is now being used, however I cannot be bothered to spend money and time for what would be a small and occasional improvement and am pretty happy with the setup as it now is.
