This is a Gauss Cannon compatible to the marble run game "Gravitrax" by Ravensburger.
It fits a 15 x 3 mm round neodymium magnet, which should be glued into the central cavity.
Should be printed with support on heatbed only.
I would appreciate your comments and/or make pictures ;)
Update 1/1/19
I've added V2 of the design as well, which fits a 15 x 15 x 3 mm square magnet, and is a bit smoother in the overall finish.
Update 2/1/19
By request - a version V3 for a round 20 x 3 magnet. :) Have fun!
License 
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License
| Gravitrax_Magnetkatapult.stl | 82.5KB | |
| Gravitrax_Magnetkatapult_V2.stl | 174.1KB | |
| Gravitrax_Magnetkatapult_V3.stl | 212.0KB |
