Parametric router template

This is small helper to calculate the sizes of plywood that are necessary to create a router template to route out a recess for a tenon or a hinge.

It is mainly meant to illustrate the possibilities of a parametric design in FreeCAD. A detailed step by step tutorial on how to create this file can be found here:

https://wayofwood.com/freecad-for-woodworkers-03-parametric-routing-template-with-the-spreadsheet-workbench/

https://youtu.be/kfyiFr8lCW4