Optimized Gridfinity Magnet Holder

## UpdateAdded a profile containing a standard bin (1x1x3u), thank you for your support 😊https://makerworld.com/models/627610-optimized-gridfinity-magnet-holder#profileId-880198 Optimized the dimensions of each component based on Gabriel Poleze's design. Magnet holder (cartridge) and bin fit more tightly now. The back of the cartridge is designed with size text for easy identification. Two sizes of cartridges have been designed (Based on what I have) for 5mm and 6mm in diameter. Each cartrid