Has anyone had a problem with the Master knob controlling the effects on the FX2 knob? No matter what I do, the Master knob (when turned) starts controlling Chorus/Phaser/Tremolo, not actual volume. It then becomes impossible to turn off Chorus/Phaser/Tremolo and the volume is not controlled using the Master knob. It does the same thing with version 1.52 or version 2.0 of the firmware (flash memory). I opened a ticket with Line6 and the response was to either take it to a service center or ship it to them. I was hoping there was something else that could be done, rather than boxing it up, shipping it to Line6 or driving over an hour to a service center.