Interesting. I wrote a silly little bash script that more or less did this, and then eventually realized I could do better for now by just printing out a bunch of blanks (keyboard) and making physical ones.
It's just too much work. Just doing it in one key is a lot, and you have to do that twelve times (fifteen if you want to be thorough and include all the enharmonic keys). So I am glad someone seems to have done it all already in a command line tool that hopefully I can automate.
