I have tried flipping the schuko for the Leben and other stuff, with no result. But never tried to get all right at the same time.... However - if I unplug everything else, and try plugging in the Leben both ways (with the schuko)I should hear a difference - if my hum issue is about polarity - rigt? Also - you have a link to that tool you are using - or a similar one?
8/20/15 at 5:43pm