Well, this is not really related to technical info, but it is something I want to know about. I have shipped exactly one amplifier, a Rivera M60. It was quite a project. I cut out pieces of plywood for the bottom and top of the box, because I was afraid the amp would fall through the bottom/top of the box from its shear weight. How do you remedy this problem without having the amp custom packed by the local "how much do you wanna pay for the box" shipping professionals? Should you leave the tubes in or take them out, and package them seperately? If anyone has any suggestions please respond, I have a fender super reverb (4x10) that I want to sell and the shipping should be more than challenging.