You can change texts or disable magnets holes by customization.
Magnets you can buy here http://www.dx.com/p/3x3mm-ndfeb-magnet-silver-60pcs-415498#.V0yINPmLSUk
I changed number of magnets, on photos you can see few.
In my case I push magnets into the holes without glue
| Circle.stl | 1.1MB | |
| ConeFinal.scad | 9.5KB | |
| Core.stl | 8.1MB | |
| Ellipse.stl | 3.9MB | |
| Hyperbola.stl | 1.5MB | |
| Parabola.stl | 1.1MB |
