Ernie.
Have you thought about developing a light weight flywheel for the smart?
I don't know if this is even possible because it may mess with the transmission control system meaning the calibration for the transmission control unit may not be able to cope with the higher deceleration rate at closed throttle or have a hard time modulating from a standing start.
But who knows, it may cope with it no problem and even speed up the time between shifts + improve acceleration in first and second gears.
What do you think?