After fishing beads for awihle, from my experience, that ticking of the bottom is perfically fine and is what you want. I can tell the difference between ticking and a strike. But for maximum effeciancy i set on any drop of my indicator thats is prenounced. Ticks are easy to notice after many outings with my nymph set up. I have noticed a few fish caught on just a minimal amount of drop with the indicator. Just be redy to set the second that thing goes down. If your not ticking bottom and loosing beads and re rigging every 15th cast or so, your not deep enough.