Yes, 1/32 oz (1/64 oz ?) yellow/chartreuse or yellow orange darts in tandem with a regular shad fly about 18" behind. Used a 6 wt RPLXi with a floating line-the shad dart was an attempt to get the shad fly down in heavy current above Chain Bridge on the Potomac. It worked but caught the fish, Hickory Shad, on the shad fly. I now use a 200 grain Airflow sink tip and no shad dart. The shad fly was a Joe Bruce design that has worked well for me.
Joe Bruce Shad Fly
Joe's fly can be tied in other colors, especially green over yellow but also red over white (silver tinsel body) as well as pink or purple over white. Another good one is the white eztaz body red head-can be eztaz,chenille or even a red bullet head, with a short white marabou tail. I tie my shad flies on a size 6 Gamakatsu SS 15 hook.