Having the extra weight of the standoffs in this part of the kite also adds to the balance for tricks.
In my experience 2 mm gfk is too soft for use in standoffs. But if it works for you, go for it. Inland/mountain wind can be very thin indeed. You might need some sort of XUL version of the kite like Rolf did.
Maybe it's nice if this topic was combined with the bauplan topic:
Bauplan: 90Three, 90Nine, 100Sixteen