[Graham]

Mine bottomed out on the bridge climb on our track but that's because the hump was quite pronounced and has been smoothed since with no cars struggling any longer...I haven't driven this car on it since...it hasn't got wheels at the moment

For the CSCRA regulations there has to be 2mm track clearance for these early cars, so that was not an issue over the hump back bridge for this car on my track, you just had to give the car a reasonable amount of momentum around the sharp bends and loops because of the wheelbase.