hay mate im a kiwi and have done allot of research on it, as its the big thing over there allows a year round game season
I was in wellington that has commercial broadbill but no one has recreationally caught one (the weather is nasty)
I also have a few good papers to read if you wanted them?
also worth looking at commercial catch statistics in nz most the broadbill do the opposite swing to the marlin, they breed up north in summer and come further south in winter
here is how we tried.
http://www.fishing.net.nz/asp_forums/daytime-broady-drop_topic88801_post1271556.html?KW=#1271556
thanks
ryan