Yep. Leave it alone if it's working. And yes it's most likely some type of cap or resistor mod to lower the dead key, or an NPC mod. But why all the swing. It isn't going to do anything running stock or with the amp. Get the carrier of amp set and quit looking at the meter so much!! If you are being told you sound good then leave it alone man. Swing mods and such look good on the meter, but some can look awful on a scope!! Just saying. And again no one on the other end will notice the difference. JMHO.