Been trying casting harness for 20yrs and trolling ones for around 10yrs.The Seaguar 20lb flourocarbon is the gold standard.Use it and you won't go back.Casting blade is the #4 Colorado hammered gold with a lip.I use mostly 2mm gold and a few green beads and a double gamakatsu octopus size 2 hooks.Tie them 2ft long.I always use a quick change clevis on all harnesses.The trolling harnesses are 6ft long leader I tie right into rig.Use 6mm beads of mostly orange,pink and neon yellow.We use both double willow rigs and #5 and #6 colorado blades.The #2 tadpoles divers work great for trolling harness and we put a swivel on the trolling harness to keep the twist to minimum.Last season the 2015 fish preferred the scorpion spoons over our harnesses,so did not run the harnesses nearly as often.Oh yeah,we would do a double hook on trolling harness about 3.5" apart.Number #1 gamakatsu on front and went to a rear treble several years ago.Good luck.