Cyclotron for physics class

My first try at a 3D model from scratch, I teach physics in the netherlands to 15 till 19 year olds and want to make some of the more complex subjectmatter a bit more visual. Wasn't able to find a lot so I made my own.

The case of the cyclotron is an example of how we combine electric and magnetic fields to accelerate particles to high velocity. Since i can't imagine schools being able to get their hands on a cyclotron i wanted to make the next best thing for educational purposes.

There is probably a lot to improve in the design so I welcome any comments. Don't have any recommended printer settings yet as well but we'll figure it out as we go.

Hope people can get some use out of this