This a remix of https://www.thingiverse.com/oostmeijer/designs insert design. I've remixed three of his inserts so that fit in a standard Gravitrax white tile. It seemed wasteful not to reuse them :-) For two of the inserts I've added guard rails to keep fast moving marbles in the remolino. That adds a different look to insert. Finally I wanted a six way entrance insert and tile. For the tile I've reworked Speedbomb's tile → https://www.printables.com/model/213249-gravitrax-base-tile-with-6-exits. I didn't need the height extension holes but wanted a tile I could standard Gravitrax inserts with.

You can see how the inserts and tiles work in the short Youtube below. Thanks for watching.