Here's what works the best for me, in order from top to bottom: bobber stop knot, small corkie, 1oz sliding float, 1oz inline weight, then however much leader you choose. The corkie on top of the float is just for assurance that your rig is all the way down. If the corkie isn't sitting right on top, something is wrong. I prefer braid for float fishing because it floats, but mono works also. The trick to securing the bobber stop knot on mono is to pull it tight with two pairs of pliers. Oh, and sometimes a small bead is needed between the knot and corkie depending on knot size and corkie hole size.