I got a new Maiden last week (my first time owning a pin). We noticed that the machine needed to be leveled better. Now it is level, but the right side flippers are making a noise. The left side flipper sounds the same. The right side sounds the same when pressed but makes a kind of hollow clunking noise when it returns back to the down position. Is this something I should care about? I can't imaging why leveling the machine would introduce a new noise.