I have a 7424 that I converted from a wood sander to a DA polisher. I was told to by the 5" counter balance weight, which I did. But unfortunately, this this just vibrates like crazy. Causes my hands to hurt in short order. Can anyone offer any help or suggestions as to what the problem might be? I have not bought the low profile 5.5" backing pad sold by this forum. I am not sure if that would make a difference or not. I have been using one from Meguiar's I believe with their foam pads. I hate to spend more money on another polisher, but this is just not comfortable. Thanks, Mark