Due to the clutch problem my car is behind schedule re the suspension upgrade.
I do have news though .......
My friend who has a 3.0 Roadster has just finished fitting the progressive suspension this afternoon.
His conclusion ..... it's fantastic

Minor imperfections such as cats eyes are not felt at all.
His test stretch of road which was previously a nightmare is now just a normal drive.
In his own words " A 100% improvement" and the car still feels firm and sporty.
"The wheels move up and down over bumps rather than the bonnet".
Can't wait.