recursive definition with kangaroo

hi all...

i'm trying to create a definition that simulates a water baloon, or a water droplet...

the pressure element of kangaroo, as i can see, works good:

the pressure force increase following the dimension of the triangle, if the triangle enlarge, the force increase, the simulation is ok

but i need to make the pressure forces dependant of the total heigh of the mesh.

I can do it using a z value of the center point of the faces, but here is the problem:

the water baloon/droplet change its total height during the simulation!

i cant use datas from kangaroo's output mesh because i get the recursive data stream error...

How i can use datas from kangaroo outputs for sucessive interation of kangaroo?

any ideas?

every answers is much apprecied...

sorry for my bad english and thanks again...

tell me if i explained bad :P