I caught my first crappie using something similar around 1960. My dad rigged my zebco outfit with an egg shaped casting bubble that could be filled with water for casting distance and to make it sink. The lure was a Go Getter. Had a shiny metal head with red & white feathers secured inside the body with plaster of paris. Big old bulky thing compared to today's offerings. He told me cast that out and count to ten and reel in real slow. The first cast I was just about reeled in when I felt the light bite and caught my first crappie. I can't remember if I caught anymore but I sure remember that one. Looks like that bubble would work also if it holds enough water to sink it.