Inspired by Bdenouden, I've changed the model to better suit my use case.

I've removed the magnet holes as I don't use them and changed the output mechanism to use tweezers or pulling the cover tape to get components.

It can hold around 300x 0402 components, 200x 0603, and 100x 0805.

As I'm new to FreeCAD I've messed up the whole source file, but feel free to add your mods.