This is a remix of a design I published on Thingiverse a few years ago. I build automated tracks with Gravitrax and didn't have a lot of use for the hammer component. So the spinner replaces the hammer. Its always struck me as a bit weird that Ravensburger didn't come up with their own version, given there's a component like this in many other popular marble tracks like Quercetti or Marble Genius.

The spinner is lighter and has a slightly tighter fit on the hammer axel. Now it spins longer and stays in position.

Be careful removing the hammer arms when fitting the spinner, they are very easy to break. Do not push them all the way in as the spinner props will scrape on the base tile.

The Bambu file has the 2 versions shown in the pictures and video. The first is a solid component, the second has windows in the props of the spinner.

Video →