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This machine currently holds the Guinness World Record for the largest K'nex ball machine. It contains over 126,000 pieces, 10 lifts, 14 motors, and over 1000 feet of track. It features a 40 foot long self-supporting bridge, a 6 foot tall vertical loop, a 100 foot long illuminated path, and a 6.5 foot wide spiral bowl.
This machine was built over the course of 2 years at Brickmania Toyworks between 2014 and 2016. It was disassembled in January of 2018.
The pieces have been donated to The Works Museum in Bloomington MN, where I am attempting to build an even larger machine to set a new world record! Check my channel for video updates on that project.