I made this for my Shapeoko to test my gCode was being correctly generated and interpreted.
Useful for holding a pen when getting started, testing gCode and calibrating Shapeoko or other CNC projects that use Makerslide.
To complete this you'll need the following:
4x Makerslide T-Slot nuts
4x M5 x 10 machine screws
2x M3 x 12 machine screws
2x M3 Nuts
4x M3 washers
Someone might like to take the .STEP file and turn it into a parametric openSCAD file so different size pens can be used.