i have my halyard/retrieval line (the same line) goes to a ring tied to the port hiking strap shackle (rear beam) then across to a ring on the starboard side, then into the grommet on the tramp (to go into the bag).

one key is to have the exact correct amount of line.. this will take up alot of the slack line all over the place. I suggest cutting off a little each time (as to not overcut) and eventually you will have the perfect amount. this will also help with snuffing as you can not drop the entire sail at once

I do find i still need to grab the extra line (when spins not in use) and tie a little slip know (i do it at the mast) so i dont have 2 or 3' of line dragging in the water under the tramp. i have learned (the hard way) that this can get cought on a crab trap, and take you from 20 knots to 0 very fast...

here is a pic of my friends 5.5 with his spin line going to each strap/beam