Since crappie seem to be at certain depths, I was wondering if a person could use a slip bobber set at that depth or thereabouts and cast out, let the lure (jig, roadrunner, or whatever) sink until the bobber stops at the knot and then begin to retrieve the lure but only slow enough that the bobber stays at the knot. My thinking on this is that you would keep the lure close to the depth that you have set and would stay where the fish are at. Has anybody done this and had any luck? I have been doing this with a jig with an artificial minnow and also with a roadrunner with curly tail grubs. Have NOT caught any fish by doing this so I was just wondering if it would work. Thanks for any feedback.