EXTENDED ANnIVERSARY 2 CD DELUXE EDITION INCLUDES THE ORIGINAL KEY TO THE KUFFS CD IN SPECIALTY PACKAGING *CDX VERSION IS LIMITED TO 2000 UNITS IN THE US . BUTTER EDITION DETAILS: THIS VERSION TAPS NEW FRIENDS, COLLABORATORS AND REMIXERS. MOST NOTABLY - BECK, BADBADNOTGOOD, DEL AND CLAMS CASINO EACH ADDING THEIR SOUND TO THE DEPTH OF THE DELUXE BUTTER EDITION.