Thank you for all the advice. The table seems to be running smoothly, and I can not detect any vibration. The table is dead level, and this is the second cartridge I have tried. I was using a Benz glider for about 4 days, and it wobbled just like the Gullwing SLR. I have also tried using two different counter weights with no luck. Could it be a problem with the unipivot bearing? My dealer and I both tried calling VPI, but I have not been able to get through to them. I just get a busy signal. Im sure my dealer will be able to get through to them next week. Is anyone using a Benz Micro cartridge with their VPI? Thanks again for your help.