I worked up a similar thing for pencil boxes while back:

http://ftp.tug.org/TUGboat/tb40-2/tb125adams-3d.pdf

and see:

https://seasick.github.io/openscad-web-gui/?https://raw.gith...

For a bit more on it:

https://community.carbide3d.com/t/making-a-parametric-fitted...

Expanding on this a bit, I'm trying for a system which generalizes to machine movement and then allows writing out a DXF to which toolpaths may then be assigned:

https://github.com/WillAdams/gcodepreview