[revision17]

Maybe it's improved since I last used it (seems to still be an issue per a 1 minute google search), but OpenSCAD doesn't really have easy support for dimensioned drawings.

While it was very handy for my programmer brain to create a few 3D printed things, when I wanted to create a drawing for something I'd make myself, adding dimensions seemed very unwieldly. I used a different CAD program for those projects (maybe Autodesk Inventor?).