What would I improve? The gearboxes with the addition of a lever coming out of the floor for correct gear selection every time and a 3rd peddle for…hmmmmm…let me think…I’ve got it, engaging the clutch instantly as required by the driver 
Yes I know it’s revolutionary and the modern ‘driver’ might struggle to grasp the complexities of 3 peddles and only 2 legs/feet but I think I’m onto something 