I would rather change [here](https://github.com/uwcms/FinalStateAnalysis/blob/53X_SLC6_Dev/RecoTools/python/vertexSelection_cff.py#L3) then, so that all the FSA object are built with a consistent vertex definition. Otherwise there is the (I guess limited) risk that lepton DB isolation correction is computed with respect to a different vertex. Does anyone object to this vertex definition change (@isobelojalvo, I'm looking at you ;) )?