This had been discussed pretty extensively over the last couple of months
http://dynonavionics.com/cgi-bin/yabb2/YaBB.pl?num=1207246187
http://dynonavionics.com/cgi-bin/yabb2/YaBB.pl?num=1207246747
http://dynonavionics.com/cgi-bin/yabb2/YaBB.pl?num=1207486931
http://dynonavionics.com/cgi-bin/yabb2/YaBB.pl?num=1207645935
http://dynonavionics.com/cgi-bin/yabb2/YaBB.pl?num=1209286763
http://dynonavionics.com/cgi-bin/yabb2/YaBB.pl?num=1213843888
http://dynonavionics.com/cgi-bin/yabb2/YaBB.pl?num=1206194261 <- This one has
lots of info
http://dynonavionics.com/cgi-bin/yabb2/YaBB.pl?num=1215433567
http://dynonavionics.com/cgi-bin/yabb2/YaBB.pl?num=1216113925
http://dynonavionics.com/cgi-bin/yabb2/YaBB.pl?num=1215718746
http://dynonavionics.com/cgi-bin/yabb2/YaBB.pl?num=1216218313
And the exact answer to your question:
http://dynonavionics.com/cgi-bin/yabb2/YaBB.pl?num=1217991353