am back to answer you i still here the Hum it is not as loud as it was after taking out the rubber grommets that no one at the store knew about even the table that was on display still had them under the motor mount
their are two screws you take out (for shipping ) when i left the store the salesman
took them out for me and theirs and no where in the manual does it tell you to remove them

anyways i am not to happy with the Hum from this table