Assuming the stopper knot is also called the figure 8, right?

For me, its usually the figure 8, the bowline, and rarely the square knot.

Thanks for the links!

I'm assuming you are putting the figure 8 in the end of the bungi cord, and the catching or holding it with the larks head, right?

My trap bungi, ends out thru a plastic hook, with a figure 8 thru the hole. The hook, hooks to the end of the trap line that has a bowline in it.

Lot's of variations.

I like the plastic hooks, 'cause when needed, they un hook easily from the bungee, and re-attach easily too.

ON my former N6.0 (the avatar), I had run three bungees, and it was easy to put the trap line where it worked best for distance races, etc. (one bungee on each side of the shroud, and one trhu the rear beam- usually used for reaching, and with the kite)