This is the second sculpture in a pair (including #332) that I built for a private collector. They were shipped to Decatur, Atlanta. 

This one has 4 tracks with 35mm delrin balls that have been dyed different colors. Half and half colors to show the rotation of the balls as they cruise along the two rail tracks. 

I built into the RBS a first for me and likely the RBS community world-wide - a loop d' loop with 39 continuous loops!  The ball races through the loops until rolling across the collector tray and up an incline to hit into a row of stationary balls sending one up into a small bell. 

There is also a 7 ball collector that releases the balls one by one after the 7th ball has gotten in line. These 7 balls activate the "ferris wheel lift" that raises up small marbles which roll on their own personal track. 

To see this all in motion - watch the video!