We’ve teamed up with Reverend Guitars and Electro-Harmonix to give you the ultimate Smashing Pumpkins rig. Enter now for a chance to win a Billy Corgan Signature Z-One and an Op-Amp Big Muff Pi! Reverend Guitars Billy Corgan Signature Z-One The Reverend Billy Corgan Z-One, a third signature collaboration between Billy Corgan & Joe Naylor, is inspired by the heavier songs in the Smashing Pumpkins Catalog. An alder body creates a thick tone, while deep cutaways provide easy access to the higher frets. The Billy Corgan Z-One is for anyone who wants to rip big rock solos with a thick yet smooth tone.