Parametric Ruler Stop

This is a simple parametric ruler stop. I'm including the FreeCAD file and a number of stops for which I've already saved for the rulers I have.

All you have to do is to modify any parameter within the spreadsheet with a cyan background color (snapshot included). The "Slider Gap" covers "shrinkage". That is, if your plastic shrinks during print and you need a little extra gap, this is what that parameter is for. "Wall Thickness" is just how sturdy you want it to be, but also plays a role in the bolt because some material is needed for the bolt to hold the ruler still. The spreadsheet also comes with the measurements of the rulers I have on hand. I've taken a picture of a few I keep at my desk.

All STLs are designed to be printed with the M12 bolt included with the FreeCAD design. Like all plastic prints, you'll need to take a little time to force the tap after printing by slowly screwing in the bolt, backing it out, then more, then backing it out, etc. Once tapped, it i