Squirrel Tie downs
I have never split a starfex head using tie-downs. Here is the method taught in Donouworth and Marsaille.
Tie the main rotor down at it's median point..ie leave it where it is when no wind is blowing, let it jerk all over the place all night, check it in the morning before you fly, 99 percent of the time it will be worth flying.
If you tie it down FFS don't drop it two inches as you might on a different head you will bust that starflex and that equals an expensive repair.
Para 2 applies to factory courses as taught on As350, As355, as365 and EC135.
Talk to the guys who design and build the things if you don't believe me.
I have been fixing these types for over 20 years,some just happen (no wind, no flex), some are engineer/pilot/handler lack of knowledge), most are avoidable.
Take care
4R