Help! I've just received my second attempt at the much hailed Red Witch pedal (used, advertised as in xlnt condition). I returned one after the first test because when I would move either the sputter or fuzz pot it was super loud and scratchy sounding, especially the Sputter knob, which also seemed to be only semi-functional sputter wise compared to some of the demo vids I watched. Well, second unit, same behavior! So, my question is, is this the way this pedal is supposed to behave or is it a common or know failure issue or should I be initiating another return?