Hannaman,
I made mine out of a canvas tarp I had laying around. I set it up just like the parachute idea discussed here. I tested it out a week ago, but there was no current or wind, so couldn't really tell. If it doesn't work out, looks like I will be spending the big bux.
A friend of mine bought one for $900 including the shackle (which alone cost $200). Definetly kicked ass and kept us in the zone like discussed in a different thread.
Once this wind dies, I will be out there quite frequenlty with all these reports of 200lb++ fish.
When the next tournament comes around I would like to add a captain such as your self to my fishing team. I will call you when the time comes for the tournament and charter you out on my boat..
Tight lines