Quote: 
1) Drawing has the dimensions => You can calculate the volume => You can calculate the mass
Complicated structure can be ignored. We need a rough estimation.
2) Your restoring force can have two terms:
 one comes from the spring constant k
 the other from the gravity

Thank you.
The wire used to suspend the EDCs is tungsten?
To verify, for my model, the EDC will be the mass of all four dampers or a single damper? The length of the wire used to suspend the EDC will be the combined length of 4 wires or length of a single wire?
Taking into account the densities for each material (specific material of each component was listed, so I looked up the densities), and trying my best to approximate the volumes of each component, I have determined
the mass of the mirror + mirror holder to be ~100 g and the mass of a single EDC to be ~19 g 