Yay, something i can educate you in!
The way I target Redfin is with light gear with a 1 - 3kg rating ( 4lb mono for trolling / 4lb braid with 6lb vanish leader for casting ) using 6'6ft or 7ft rods, my SP setup or my whiting rod seem to work best.
Some people use soft plastics with great sucess but for me HB lures with plenty of action seem to do the trick on the troll, Killalure Pakrats, Deception Shrimps, Craftmaster Merlin's or even minnow style lures... basically anything that promises a depth of 3m+.
I have also used large Rebel crawfish, smaller yabby lures and smaller poltergeist's, some of the suspending scorpions, Tasmanian devils and even lipless crankbaits with no action have seen me pull some horses close to 40cm.
From a casting / shore perspective nothing beats larger celtas or bettlespins, the trail created through the water and bubbles seems to pull the schools in close often competing for the right to take your treble, also I have had some good sucess casting Tassie devils from the banks of LBG with similar results...
My best Redfin to date was from shore near the dam about 8 years ago ( Before the Bushfires destroyed many easy access locations ) using a red Beetlespin cast into a still pool gap in between some weeds as an experiment, I estimate this fish was close to 50cm and still to this day havent heard of many people pulling larger Redfin from LBG.
Red Pheonix and friends have had some great fish of about 45cm, they tend to troll with softies although Red has his favourite lure ( 1 - 3m Juro in tiger stripe ) constantly dragging with a fish behind his esprit.
If you want some photos of the lures I can post some here...