Hi Stubby79
Sorry for the confusion with the names, I am a 78 model myself.
I agree with you. Adding supercapacitors can be done to make the regenerative breaking better, but what do you do with all the extra power. The battery will soon be fully charged. So you need some motor to get the power back to the wheels.
I have already changed most of my lights to LED's, so the battery doesn't need much charging anyway. It is just the charging power that got wasted as gassing that I wanted to stop with this circuit. At the same time it also lowers the alternator power requirement during normal driving.