• Tension the cap shrouds to 15% of the breaking load of the wire. See the “folding rule method”. Count and make a note of the number of turns on both the port and star- boat board rigging screws required to increase the tension by 5% (1 mm stretch). Leave the folding rule on the shroud.• Roughly straighten the mast using the lower and inter-mediate shrouds. Note that the intermediate shroud tension should be fairly low at this stage, only sufficient to keep the mast straight. Check that the mast is straight by sighting up the luff groove, all the way up from deck level. • Increase backstay tension to 20% of its breaking load. Mark the setting on the backstay tensioner at this pre-tension level as well. The cap shrouds tension has now been reduced since the masthead has been pulled down- wards/aft by the backstay. • Increase the cap shrouds tension to 20% of the breaking load of the wire. • Tune the mast straight again using the lower shrouds and the intermediate shrouds. • Slacken the backstay to 15% of its breaking load, in other words, to the first mark. • Now check the cap shrouds tension. It should not exceed 25% of the breaking load of the wire. • On this type of rig, forestay tension is affected by both backstay and cap shrouds. With 20% of the breaking load in the backstay and cap shrouds respectively, the load on the forestay is about 40% of the breaking load.