Gridfinity - SPI/Starrett Spindle Square Holder

This is a simple gridfinity holder an SPI Spindle Square. This may also work with the Starrett listed below. It uses a 4x4 grid. The model shown is printed with eSun PLA+ Bone White for the base and a 1.5mm lip at the top using Polymaker PLA Pro Metallic Chrome for a contrasting accent. This was done with a layer height modifier for the last 1.5mm. Here's a list of what's used in the holder:SPI Spindle SquareStarrett Spindle SquareStarrett Spindle Square (alternate)