wow. I know I am sort of out of touch on these new fangled sport kites but........
The STX 1.9 is so old I seriously doubt it's fangled at all.
does half a centimeter placement actually make the total difference???
Both yes and no. For most things there's a range of it'll work
then there's that elusive sweet spot. If someone has already worked out a spot that works, at least give that a try.