Hey Walt, it is almost identical to the harken deal. Only it costs about $100 total with shipping! Thats harken for ya.
How do it work? The furler on the bottom attaches to where the jib would connect, the top is pulled tight on the halyard. You keep your forestay so in essence this becomes a backup to that. Like I said, I had to move the stay forward a couple of inches to clear at the top. You pull the furling line and the sail twists around itself untill furled. The swivel at the top does what its name implies. They say its not for reefing though. The wind was up when I tested mine and it did just fine without being hanked on. I thought it would sag away from the forestay but it didnt do too bad. Pretty cool. This is not very different from the new code 0 junk for expensive boats. They fly their gennackers off of these fancy ones and they work well. Not hanked on or anything. I got it from Duckworks.com. The swivel is from west marine, a ronstan job for about $25. I am using 3/16 line for the drum.