(customizable) Keys holder wall panel

I like **vipenzo** design a lot. I had printed a few for family and friends.

Someone asked to me if it were possible a number of keychains other than 6. Since **vipenzo** share the scad file and I want to gain skills with OpenScad, I decided to remix to a customizable version.

I'm a newbie at scad and do learned a lot with this job. Of course, there will be lot of errors and other ***s.
I am looking for good advises about my job.

In this version, you can play with many variables: number of keychains, dimensions of panel and keychains, texts....

I have tried to set good limits to they, but not tested so many combinations.

Now working on selectable fonts and sizes for the different texts, but not in this version.

I use to print panel with wood filament, and keychains with normal PLA.

I have tried to make it work in Thingiverse Customizer, but "somethin went wrong" and I have no idea what is happening.
Anyway, it works fine in OpenScad customizer.