About this 3D model

This is my Magnetic Starter for the Gravitrax Marple Run. Here, you can see how it works and its assembly: What you need: 2x Spring with 5x18mm (or from a pen) 2x 6mm Ball (Airsoft pellets - also called BB pellets) You can choose between 10x5mm, 10x4mm, 12x3mm Magnets (Please download the correct model)