i have used bungee and it worked well. for some reason i needed about 18 inches for it to work with my lines and spin setup. the advantage (i think) is that it was flexable... and actually allowed a little spongy play when i retrieved the spin.... this might help prevent a tear when retrieving the sail. i think the disadvantage may be that it may cause extra friction when raising or dousing.. and that could lead to small "burns" in the sail. I try to pull the tack line slowly to avoid this as well.

i liked this until 1 time when my spin became completely tangled in it (it basically wrapped around a big ball of spin) and i couldn't get the sail to open... nor could i get it to go back in the chute.

this was of course in 20+ wind and caused me allot of grief as i ran over my sail (shrimped) and had to cut the halyard to save myself from capsizing.

It was probably caused by me manually packing my spin in my chute on the beach (it was too windy to open the spin on the beach to make sure it was all correct). all the lines were actually correctly run... but

I have since removed that extra ring/bungee to avoid an extra line to get tangled in