SEAN-THOMAS
As I shared with you previously, I have my velocity model ( coil and magnet ) 
STM-8 seismo working.  However, I have tried many combinations of weights and 
distance from the hinges to the flexture bars - but my best period thus far 
is about 4.5 sec.  I presently have the distances from the hinges to the top 
and bottom flextures as reflected in your drawings.  Any suggestions to 
assist me obtaining an eight second period or longer would be appreciated.
Jim Allen
Cerritos, CA

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