The Master Magnet Library

The Master Magnet Library: Never Glue a Magnet Backwards AgainBuilding modular 3D printed projects (like Gridfinity, HSW, or magnetic cases) is great until you glue a magnet in the wrong way. This project provides a standardized set of Polarity Alignment Tools for every common consumer magnet size.I am providing these as a .3mf file, organized with one diameter size per plate (ranging from 2mm up to 20mm).What is a "Master Magnet"?It is a physical "lug" or jig that holds two magnets of a specific size in a fixed, labeled orientation. By using these as your "Source of Truth," you ensure that every project you print—today or a year from now—will have perfectly compatible polarity. The Library Includes:Micro/Specialty: 2mm, 3mm, 4mm, 5mmThe Workhorses: 6mm, 8mm, 10mm (including common 9.5mm/imperial-adjacent sizes)Structural: 11mm through 20mmThe "Master Fixture": A dedicated base station designed to hold the specific Master Magnet you are currently using f