Last night I was trying to print a camera lens clip that allows you to clip your camera lens to your camera strap. Unfortunately the clip for the strap wasn't wide enough. Fortunately the OpenSCAD files were included, and all the settings were in the file. It was simply a matter of changing the appropriate variables in the OpenSCAD file and then exporting the model. The great thing about OpenSCAD is that it is like a programming language for your 3D models. As such it makes parameterising the important parts of the 3D model easy.