They've been at 1/3 from day one this season. She's never skied the new skis at 1/2. She looks pretty darn good to me on them. She is 164 tall, 110 lbs. Again, that is an easy change to make if necessary.
This year, 150 Nordica SLJ (now at her bottom lip) and the 171 Nordica GSJ which is 169 standing up. Last year, 140 Elan RCS @ 1/2.
Judging from her skiing, I think the 1/3 is ok. I could not put her on 0.5 first, without seeing how the new stuff worked. I thought 0.5 could severly limit her range of movement, and I still do. With 1/3 there is the same lateral movement before it hooks up, and she's a heck of a lot stronger this year.
BTW: She is quite used to *very* sharp skis. I generally tune them every weekend, and have never detuned. The girls have grown to despise skis that are not very sharp. They will tell me when their edges are off.
I am thinking about gently detuning approx. 2.5 cm back from the tips of the GS skis with a gummi stone. Maybe 2.5 cm from both ends might be a good idea?