you could just as easily put assist hooks on your diamond jigs and remove the trailing siwash. I think butterflies haven't taken off here because jigging is nothing new here. People have been jigging for bass, blues, seabass, tuna, cod, etc for many many years before butterfly jigs came along. Most times when you do see someone using butterflies instead of traditional diamond, hammered diamond, vike, norwegian, etc jigs the butterfly jigs they're not doing better than the people using the traditional (and much less expensive) jigs. That's not to say that there aren't times when butterflys will catch better than other jigs - like all lure fishing, on certain days one lure will do much better than another - but overall, diamond jigs haven't proved to be more effective than other jigs and they cost considerably more. I do like the look of the flat-side butterfly jig and will probably add a couple to my tuna jig bag.