Problem with EntityParent et ScaleEntity

@Klaas: that's not possible in my case. In fact I have an entity (a player) and this player has the second entity (a ball) in his hand. And as the player is animated, the ball has to follow the hand of the player. In summary, I do this:
scaleEntity player, 1., 2., 1.
Find the hand (bone) -> pivotHand
animate player
...
entityParent ball, pivotHand
-> And the ball is then scaled!!

I tried to use an intermediate pivot like this:
newPivot = createPivot()
entityParent ball, newPivot
entityParent newPivot, pivotHand
-> The ball is also scaled!!

And, as for your solution, Klaas, I don't see how I can implement it as the ball has to follow the pivot pivotHand, which moves with the animation.

@Tom: as I said, I can't use scaleMesh instead because several entities share the same mesh, and I want to scale every entity differently...

So still no solution.....