I fitted the Suplex to my 2005 Roadster V6. The ride was improved beyond belief but the cornering and handling was frightening. The front tucked in very sharply and unpredictably and I felt I could not trust it. The was a lot of bump steer and she felt very skittish.
I have had the front end sorted by Tim Ayres at New Elms and the handling is now very good. He took off the Suplex fitted Rutherford springs and changed the Bilstein dampers supplied with Suplex for AVOs. There is more to be done by moving the track rod arms to underneath the arm on the stub axle, refitting the damper blades and fitting brake reaction bars.
I hope all that improves things!
John