Rig Tuning

Shane Grover, of Seawind, wrote a technical article in June of 2021 that outlines rig tensioning and tuning that is specific to Seawind catamarans.
Technical article: File:Rig Tensioning and Tuning.pdf

I have also discussed the topic with circumnavigator, sailmaker, and rigger Jamie Gifford who as provided the following additional advice:
1. Catamaran rig tuning - BIG tension in the diamonds stabilizes the rig
2. Shrouds and headstay are minimally tensioned and reduce shock loading - excessive tension can damage a catamaran bending it in half
3. Too much tension is the common mistake with catamaran rig tuning
4. When on a close-hauled in 15+ knots of wind, the leeward shroud should get loose