I forgot to also add that you're going to need to buy new pots I believe active pickups such as the EMG 81's operate with 25k pots... and you'll need 250k pots if you are going to a S/S/S coil configuration...If you're going to to keep the humbucker then you will need 500k pots... the schematics should tell you what kind of pots and switches you will need.