Description

I needed a template for a double flat round switch so I could accurately cut a hole ..

The Template includes alignment notches.

Using OpenSCAD 

• download OpenSCAD  https://openscad.org/downloads.html
• open the  .scad file  
• make any changes you need
• Use F5 to preview the model or via the menu Design/Preview 
• Once you are happy with the model use F6 to Render the model or via the menu Design/Render 
• Use F7 to Export the STL or via the menu File/Export/STL

You can find shortcuts for preview, render and STL on the menu bar 

Customising the Model

Set the following

• template_height 
• diameter
• flat
• template_size