Different Positions in Buffer for Mobile Storage

Hi All,

In the below simulation I have a part that is being packed to a mobile storage (pallet/cart) I then want to store that packed mobile storage in a buffer until it is retrieved. Right now the simulation is working, but all the mobile storage show up on top of each other. If I turn on the "stack up of parts" option I then get a stack of mobile storages and parts. What I'd like to represent in the model is placing the mobile storage in different locations (horizontal stacking instead of vertical). What is the best way to achieve this?

Illustration

 

3DXML