Apparently the relative roll centre heights for front and rear axles affect balance significantly so I guess this would at least partly explain what you saw.
RE the bumpstops - The joys of the standard dampers - eh!
Originally Posted by Chris155
The thing is..... Whilst I raised the front ride height in comparison to the rear I actually dropped the car 10mm. It was a PITA on the road. I think I had it too low as it was hitting the bump stops all the time.
I then raised it 20mm so its now comparable in terms of ride height with a friends car on Konis.