So, this is where we left off:
Seven cans high and seven cans wide. Hmm, I think I can do better than that. And so I started to think on how I could add more layers to the tree. This was one of the first ideas that came to me:
I started building the lower 'ring'.
Two can wide.
And this is how it should look when it will be finished.
The lower 2 layers that will be added.