[SUPPORT] Advanced Turn Based Tile Toolkit

Hi Mono,
Not sure if I am in the correct Thread.
What a beautiful written engine, well done.
Just a quick question: I am trying to find somewhere in these threads, I am sorry if it has already been discussed, being able to stack units on top of each other.
would I need to add a array for the add and also use mouse right to be able to select the tile or am I still able to use mouse left.