You can build a Mellowtone Wolf Computer or a modified version with additional features. The real deal has vanished completely but you can build one yourself using this work-a-like. Many people have built this circuit and claim that it does indeed sound and work like the original. I am not Eric from Mellowtone. I am Eatyourguitar. I hope you enjoy the features I added. I am very proud of this project and I am very happy that Eric's ideas are able to reach more people. NOTE: the video shows the Mellowtone version. The Eatyourguitar version has more knobs and can be used with guitar or bass. The PCB you are buying can be used to build any of these variations or something in between. Maybe what you come up with will be totally unique?