It's not hard to flip her spin direction, just focus on the point of her toes and tell yourself that her toes are going from (left->right) or (right->left) and that'll change the way you interpret her spin.

That was a good tip. I spent the last 5 minutes making her change direction all the time. In the end I could make her switch almost every time by focussing on her down-foot for a while, just as you said, and then slowly blinking (eyes mostly closed) until I hit an animation phase that triggered the switch.

Nonetheless still interesting how hard it is to make her switch. Right now, only 30 seconds after I lost interest, I don't think I could repeat the trick without re-focussing for a few minutes first.