Magic Tracks Crossover

**Edit: I've added a [new improved version](https://www.thingiverse.com/thing:3719607)**

This is a 4 way cross over connector for magic tracks. It is can be hard to connect the first few times - make sure the brim has been fully removed (a craft knife is the best way).

Update: I've added a version with a smaller bump for the middle section. It makes the cars more likely to stay on the track.