Hi, This is a real life problem I am trying to find vibration effects. I have 2 servo motors constantly going back and forth on a granite countertop. The two servo motors are moving two 75 KG masses. I am trying to solve for the vibration effects that will happen on the granite countertop and all I read about is mass damper systems. Is there a spring and damper value that I should assign to the granite table? How do I solve the problem?