I have never seen or heard of it!? but I believe hi if he says so and its a whole lot cheaper too.
Spring-
could you send a pic of the way you rig your gun so I could steel your idea I mean get a better idea of how you run the line?
I also will run a short 6' bungie off my shooting line then to my regular 100 ft float for WSB and yellowtail.
thanks
Joel