Hi Geoff, correction on your remark about the water pipes. Water EXITS the cylinder head TO the radiator header tank, not the way you described it. Also, it`s not that amazing to pass through the chassis tube like that, because the engine is sitting low to get the centre of gravity as low as possible and the transverse leaf spring is right in front of the water outlets, so there`s not much option other than welding water tubes through the chassis tube to give a direct route to the radiator. That way it cuts down the amount of possible leak points with long lengths of pipes and hoses.