Sometimes you have to change a little aspect, as the text or one or more dimensions, of your object before printing. In these cases you can model from zero your object or try to edit it directly in your software. With OpenSCAD and the parametric design you have to simply edit a text or a variable in a editor and after a render you can save the STL file, ready to the slicer! I will show you two examples that have facilitated my life.
In the video below I show you with an example how easy is became to design and make what you want to make, thanks to the 3D printing. Now it is also valid for a novice like me. I was looking for a support for the brush heads of an electric toothbrush, but I didn't find a cheap one in the shop so I downloaded a version from Thingverse and modified using Blender.
The process can be reduced in four free and open source steps: