I of course have commercial interest in this product as I designed the SUPLEX 5L rear suspension system with help from SUPLEX UK Ltd.
Williams Automobiles will start fitting their production 5L set this coming week on a +4, which will then be available for demo. Maybe on the road the week after as Lawrie and pals need to make sure their race car is ready for this year's final race at Snetterton next weekend. Their 4/4 race car is still the best cornering car on the circuit, love it when Henry sits on the tail of the works ARV6 through the twisty bits, like at Donnington this weekend!
I am about to start tuning some nonadjustable Bilstein monotube dampers for the 5L rear to match the RS fronts, and Quantum are making some adjustable monotube front dampers to match those setup on the rear. The work I did on the Quantums for the Williams race car has been very beneficial for both projects!
I will soon get a production 5L set on my old narrow chassis 4/4 to replace the 'man in a shed' prototype set which has held up well for 18 months. Regards PJB.


4/4 2.0 Zetec SSL front and rear