My EDA905 came today. Yay. The first thing I do is tune it then turn the knobs to see if any of them are loose. SON OF A BIATCH!!!!!!!!! I feel like taking a sledgehammer to the bass when I find that the piezo treble knob is loose. I have an SR400 with a nonfunctioning treble knob that is loose. I'm seconds away from selling Satan my soul if he would give me the power to destroy Ibanez. But then I plug it in and all the knobs work. Maybe it's normal for the piezo treble knob to turn easier than the other knobs? I have to know if my bass is OK so I can set it up and dig into it or start packing it back up. HELP!!!!!!!!