Rollover testing

[stan.distortion]

Getting hysteresis, not sure if its coming from the physics or the tyre stiffness calcs, guessing the physics as increasing the stiffness is changing the amplitude and not effecting the frequency.
Loads fluctuate between 1800 and 2000 every 10 ticks in an n shape. Couldn't add an image, can email details if anyone wants them.
EDIT halving the stiffness to 1E5 has more or less got rid of the issues I was having, tyres are way too civilised with the settings I was trying to make them to behave more predictably
EDIT2 Guessing doing this is getting around the issue rather than fixing it (bodge ) but it's made a big difference. Tried it at 5E4 and hysteresis is less than 3% (is over 10% at 2E5) and the car feels a lot more positive. Suspension and grip values have to be raised by about 10% in the .car file for the same characteristics.