These cap value changes produce a very good result -- Analogman says, see: https://www.diystompboxes.com/smfforum/index.php?topic=27356.msg192254#msg192254 the "or 22n" is only my idea, based on kitchen physics (thinking that 47n is way-way bigger than the 4.7n) Layout: dirtboxlayouts. PS: it goes without saying that instead of the other 1uF electro, a film cap should be used...