Reg another suggestion given you have the factory 5 link are these dual rate coil over dampers from SSL. Click image, if you haven't got them already that is.
![[Linked Image]](https://i.imgur.com/XYguLx8.jpg)
I was told that in order to limit roll (as cheaply as possible) MMC spec'd stiff springs which certainly didn't suit the average Norfolk road. SSL came up with a dual rate solution with adjustable damping.