Put some 14" shocks with 325lb springs and 20 mm spacers on the car. It's now totally transformed. Previously it was bottoming out with 275lb springs and the inner tyre wall was hitting the inner arch. Ride is firm though I can live with that given the level of compliance, It's not trying to throw me off the road at every bump now. Grip is phenomenal now though The nangkang trackday tyres help no doubt.

Not sure what springs I have on mine but they bottom out reasonably regularly on bumpy county roads. There is not really that much travel available for the rear wheels. What shocks and springs did yours come with?

It had 13" gas shocks and I'd changed the springs to 275lb previously. I've maxed out the ride height, as you say not much to give, though when static it's not quite topping out if that make sense.

[Edited on 3/3/17 by B33fy]