Presenting, "METROPOLIS" . . . a crazy-tall K'NEX ball tower!

* Building time *
Oct '09 - Aug '10

Number of pieces: 29.873

* Dimensions *
Width: 1.40 m
Depth: 1.15 m
Height: 2.40 m

Weight: 48 kg

Link to picture slideshow:
http://www.instructables.com/id/Metropolis-a-Knex-Ball-Machine/

Instructions for most elements used in this ball machine can be found here:
http://www.instructables.com/id/Metropolis-Knex-Ball-Machine-Elements-and-Lifts/