I loved the marble machine that Jazzmyn created. http://www.thingiverse.com/thing:892619 It's awesome. I thought I'd contribute by making some clips and rings that hold the track in place without the use of zip ties. I created new clips and the ring so that the track is held in place with pressure from the clip and kept from rotating by adding notches to the clips and ring. The clips should work with the smooth rings if you already have them printed, they just may not hold the position as well.

The clips may need a quick slice along the middle to separate any strings that form along the small gap.

I hope everyone finds these useful