Upon Jeff's recommendation I made a new set of blend filters for HAM-ISI that feature:

• The eLigo high roll off blend filters on RX and RY, to limit vertical GS13 noise injection in low frequencies. 
• Unchanged blend filters along the other degrees of freedom.

I installed those filters on HAM3-ISI and compared the isolation performance with what we had before. Plots are attached.  

The new set of blend filters help us meeting the requirements below 1Hz, while still keeping motion within requirements above.

Those blend filters are currently installed in the filter bank 9, as "R_eLigo"

The Script I made to create those blend filters is commited under the the SVN (r7461):   /svn/seismic/HAM-ISI/Common/Blend_filters/makeHAMISIBlendFilters_Hybrid.m
The resulting set of filters is commited under the SVN (r7462):                                         /svn/seismic/HAM-ISI/Common/Blend_filters/Filters_HAMISI_Blend_Hybrid_24_Jul_2013.mat