The file 'GraviPumpkin 3D Printer Model' is (stl) file type, size is 19.8MB.
Made it compatible to Gravitrax.
In addition, I split them into 2 pieces so that you can print it without support.
Use the "Remixed" link to download the ring ("flat parts, gravitrax compatible" by majitelgalaxie).
I actually downloaded the ring from https://www.thingiverse.com/thing:6030271.
UPDATE: Ball doesn't roll through the tunnel after trying it out. I fixed it.
GraviPumpkin_bottom.stl | 13.0MB | |
GraviPumpkin_top.stl | 41.5MB |