My concern for a road car would be how does the car react to bumps at speed, particularly during cornering - the roads in Surrey are seriously bad. Suspension is a real art - Lotus get it - they manage to get cars with a low centre of gravity, which react well to cornering forces but which are still compliant - that is not an easy thing to achieve - the combination of springs, arbs, dampers, bushes, geometry, tyres, pressures, etc.