[express]

I use a long tack line(guy) run throught the out board end of my spinnaker pole about 1 1/2 times boat lenght. As for sheets they are also 1 1/2 times boat lenght and I do not use shackels.I have had shackel hang up when jibing the sail. Twing lines are a great help to control leech tenison for tight reaching . For short handed stuff a sock is a good tool to have.
Bill S