Thanks James, I am a great believer in sticking with 6V and original equipment where ever possible, and I must say I have never had any issues with any of my cars, hence my curiosity, and of course I agree it's personal preference what modifications if any are carried out. I have a pressure fed speedy type engine in the Nippy and that spins into life easily in any conditions, the engine is reasonably fresh and I completely rewired the car with multiple earth returns which may assist reducing volt drop.

Location: NZ