Really cool build thanks!
Had to make a few changes to the original model to make it fit with gravitrax. Two 29ml (side to side) & 3ml tall hexagon on bottom. I also trimmed the exit hole slightly to keep balls from getting stuck.
(I couldn't share the adjusted remix version)
The design is great and printed well, but it doesn’t fit into the Gravitrax board. Appears to be missing an adapter hex ring on the bottom. I was able to make my own adapter and glue them to the bottom, works great now.
I used the hex rings from this one. They’re a little loose fitting in this design, so I used some Gravitrax pieces to hold them in place while the glue cured.
https://makerworld.com/models/108853
First print was not that good. Printing a second time WITHOUT support and it turned out much better! Will try another print with finer lines, so the ball isn't slow down that much.