Maybe that your improving your bait selection or places your fishing as yet this season (spring/summer) i havent chance upon any yet. Although mili has cuaght a few more than usual, in areas that havent really produced before. There is some areas up here in marlborough that produce sevens prettyy regularly provided you through the right bait in the water.
You probably have to go fishing to catch them HLS.
I been getting onto a lot of them. Gotten them on my last 4 trips out (and only 1 of the trips was to the sevengiller beach). They are very common in the Sounds this year, last year I did not get one in the Sounds.