Marking Gauge

I was looking for a DIY marking gauge for a new steel ruler. While searching thingiverse i found this one made by user "WayofWood".
I decided to design it by myself as a little Freecad (0.19) training.

Instead of the nail i decided to use M3 screw and nut.

It took me 5 prints to get the perfect measures but now it works flawless \o/.

Update 30th Dec 22:
I also uploaded my FreeCad files for your use. Following dimensions can be set in the Spreadsheet:
- Ruler Width
- Ruler Width Tolerance (for better sliding of the ruler)
- Ruler Thickness
- Ruler Thickness Tolerance (for better sliding of the ruler)
- Screw Diameter (+0.5mm will be added automatically) - >4 is not recommended

Feedback on the freecad files are highly appreciated :)