The mast should now be centered and straight. A tension gauge to measure the shroud tensions. Go sailing and site up the mast for the final rig tune. The mast tip should remain centered on both tacks and adjust the lower shroud tension so there is approximately inch of leeward mast sag at the spreaders on both tacks. The goal in these conditions is to keep the boat moving as fast as possible at all times.
Speed is more important than pointing.
Set the adjustable aft lower shrouds so the mast is perfectly straight with a slight bit of backstay tension. Trim the mainsheet till the top batten hooks 5 degrees to weather of centerline and then pull enough backstay to twist the top batten till it is parallel with the boom. Set the traveler so the boom is on the centerline of the boat and there should be no boom vang tension in these conditions. Set the cunningham with slight horizontal wrinkles along the luff of the main. Adjust the traveler and the mainsheet to keep the boat moving fast at all times.