I had a fellow here to have a look at my 3300 to purchase, however we discovered an annoying vibration at substantial volume. We were trying to remove the panels in order to figure it out, which is proving to be a bit of a trick. I have managed to get the lower one off, but the upper one is defeating me. I would really like to do so without damaging the cabinet at all. I think the spray on coating was not really dry when it was assembled, and has glued it together. Any ideas would be quite welcome, as well as potential sources of this vibration. Cheers Mike