Set the shrouds in the lowest hole in the chain plates. Step the mast. The forestay will be loose. Raise the jib and, using the thimble in the end of the halyard, cheek block and cleat on the side of the mast to make a 3:1, tension it very tight. That'll take all of the slop out of your rig.

If you want to use a better 3:1 system, buy or assemble a Aussie halyard system. Add a small cheek block on the mast just above the top batten and run the halyard around it. That'll keep the halyard on the side of the mast so the battens won't hang.