I used a 500ml softdrink bottle, cut the bottom out and carved a piece of styrofoam insulation to fit in the small end. I cut the barbs off a big treble hook and pushed the eye through a hole drilled in the bottlecap and screwed it on tight. Tie your line to that. Coathanger wire makes a good bail and an S-hook tied into your line about 18" up completes the set up. You cast it out, the s-hook falls away from the bail, the insulation floats the small end upwards, the bait falls out and it retrieves with the streamlined end forwards. I only have to bait out 40 yds. max so this is adequate. I'm using a yard sale rod and sea reel with about #30 mono. A broken flashlight (torch to you) would make a smaller, more streamlined spod and probably get better distance. This rig works very well and several times I've had anglers come running to see how I was getting all that particle across the river (spodding nearly nonexistant here in the colonies). The tackleshop owner who's been promoting carping here saw my home built spod and at the next tournament there were a bunch being used.