I too fish wacky rigged senkos without an O-Ring. Not much to it, flip it to a likely spot, let it sink. If they dont hit it on the way down, slowly lift the rod tip and shake the rod. Try this alongside the boat first to get an idea of what different lifts and shakes do to the worm. Also, no need to keep the line tight to feel hits. When they grab it, they go! I use circle hooks so there is no hookset, in fact, just lifting the rod usuallly does the job since they most often hit on the drop. But if you see the line race out, wait for about 3 seconds, then lift the tip firmly, but dont slam it like you would a texas rig, the hook is exposed and not designed for that type of hookset. Good luck!
