Effective mass of the Basik arm, and others can be found here
http://www.vinylengine.com/tonearm_database.php?make=Linn&sort=manufacturer&ascdesc=ASC&type=1&pass=null&Search2=Search
http://www.vinylengine.com/tonearm_database.php?make=Linn&sort=manufacturer&ascdesc=ASC&type=1&pass=null&Search2=Search

