There has been a lot of activity lately on the Yahoo Compac Group's forum on this simple little device. Check it out.
http://www.com-pacowners.com/4images/details.php?image_id=224&sessionid=95a5694ad5a566f60e4e1a4b2e3d46dd
http://www.com-pacowners.com/4images/details.php?image_id=225&sessionid=95a5694ad5a566f60e4e1a4b2e3d46dd
http://www.com-pacowners.com/4images/details.php?image_id=226&sessionid=95a5694ad5a566f60e4e1a4b2e3d46dd
a really simple addition that trims in the sheet from the Jib/Genoa and it actually helps to point higher.
It consists of a carabiner attached to the back edge of the tabernackle (there are those holes on the flanges next to where the mast base bolt goes). On this carabiner goes a micro block. Through that is a line around 10' long with a snatch block on the end of it. This is clipped around the sheet line and drawn in to the center as much as you like or until it touches the shroud. (with the snatch block you can attach and unattach it and easily switch sides that way).
Dale