Jim, I think you may be worrying too much. Just tune the rigging
as you would any other boat with 1/8" rigging
Keep the masts in column by sighting the sail tracks, set up and adjust the turnbuckles
evenly and that should keep it in the middle of the boat. If you are really concerned about the proper tension, you can buy a cheap tension gauge. But it's not really necessary.
Tune the boat dockside a little looser than you think it should be and then go sailing. Your lee shrouds should not be sloppy when sailing a broad reach in 10 to 15 knots. Your headstay should be tight enough so that it doesn't deflect too much.
There is really no one exact or precise way to tune any boat.
You may want to hire a rigger or another sailor you know to be qualified to tune it up with you the first time. Watch what they are doing and ask questions.
But seriously, don't sweat it too much.