Sorry Matej. It is much more configurable than I thought. ( I was dazzled and did not see it 
).
Iām trying it now but I donāt get the trick. Seems like locating the point in the center, it splits the composite in two, but now they donāt separate. With custom they expand in the inverted direction
Itās ok. Some hand work. I donāt like very much introducing Rigid body which could change the stiffness of the plate.