Has anyone tried a rig like this?
My theory is that it might be helpful when you are unsure of where the fish might be (thats me 100% of the time).
I've not tried it yet, but will as soon as I get a chance.
It should allow the trace and bait to slide up and down the mainline much like a sliding livebait, therefore covering a greater area in search of a fish.

Some one must have already done this, what would would be the drawbacks if any?