Elias, I tested the selfrunner setup and it did produce pulses of 2000V. But the recovery coil must be pulsed to get this result and also in the right timing. If I did not pulse-discharge the coil, it produced only about 30V, but when I pulsed at the right time on each revolution with a relay to the primary battery, I could get those high voltages. Also, if I loaded the recovery coil just with a light bulb, it created a serious drag on the wheel, but when pulsing the coil, it did not create any drag at all I will draw a schematic of my setup later