vibration and optical precision

We are currently setting up a flow cytometry facility in a new building 
(apparently not as sturdy to use a poor term as our current building) and 
the issue of building vibration, and potentially those transmitted by trams 
passing outside is being repeatedly raised. I have gone through the list 
and it seems that this is not really an issue in regards to cell sorting re 
drop formation, purity etc. Certainly I haven't noticed any vibrational 
problems on our current FACStar. However what about vibration effects on 
optical precision and resolution, especially in regards linear 
amplification and detection of small and dimly fluorescent particles (eg 
chormosomes, smaller than human). Has anyone any knowledge or experience in 
regards to this?

Cheers,

Matthew Burton
Flow Cytometry Facility
Murdoch Childrens Research Institute
Royal Children's Hospital
Flemington Rd
Parkville 3052, Victoria, Australia