Reading this thread has been very interesting and I was at the point of telephoning Kevin Vernon when I had to stop for a bit of thought. Yesterday I went out to find all the surface undulations and erosions on the back roads around here ( and believe me French roads have them) and thought to myself, well, this is not so bad. I have already fitted the Mulfab short springs and roller bearings which in them selves have made a huge difference so I am left wondering whether the change to Suplex will pay sufficient dividends to justify the further expense. Those of you who have made the change are obviously impressed and satisfied.