New Project - 2 story ball tower

I have started work on what will be my largest K'nex ball tower yet. The motorized lift will sit outside my house where it will take balls out from the side door and up through my window. From there the balls will wind through my house and down the stairs to the lift again. So far I only have the main lift support completed. The track will be modular so it can be assembled as quickly as possible. More pics coming later.

Edit: The ball tower is finished and can be viewed Here