3D punchbox

I bought a so called " 30 notes programmable music box".
It comes with few strips of card board and a punching tool to code the music with a succession of holes...
Of course this is a really boring process !
I had to make it automatic using a small script in autoit which eats as input a midi file (single instrument file) and generates as output an openscad script nearly ready to print.

see it here : https://youtu.be/SlEqRXkuC74

Read the video to the end as some user manual is inside.

You'll have to download Midicsv.exe from here : https://www.fourmilab.ch/webtools/midicsv/

you'll have to install autoit from here : https://www.autoitscript.com/site/autoit/downloads/
and compile the 3Dpunchbox.au3 file

or directly use the provided 3Dpunchbox.exe file (if I succeed to upload here). Otherwise you can PM me and I'll join it to a mail !