New to me H18 Formula, rigging advice please.

Hi all

Just acquired a '92 H18 Formula, it has been well cared for, however I am giving it a thorough going over.

Reading through the H18&SX manual I was surprised to read this paragraph regarding shroud tension on page 15

11. With only the main sail up tighten the shrouds. First move the traveler car all the way over to the port side of the back bar. Next pull the mainsheet in very hard. The port shroud should be slack now and can be moved down in the stay adjuster. Repeat this procedure for the starboard shroud. Note: Tension on the shrouds must be relieved before lowering the main sail. If you intend to unstep the mast.

Must have missed that section years ago - whoops - so is that the recommended technique nowadays?

Next question is regarding Diamond wire tension - what is the best way to say it up / get that right?

Many thanks

Phil.