Chain Jig?

Ever heard of the Chain-Jig? I heard we can rig up this jig simply by getting 3-4 chain links from a hardware store.. Cable-Tie it to a large enough hook and walla! Your very own DIY Chain Jig..

I have yet to try this but it's definately coming under my "next DIY" project ... It also seems Groupers dig this jig! If you do try it ... let us know the effectiveness!