Do you know SaReGaMa's story? He received a Hugh Tracey Karimba as a gift, but it was out of tune, so he started inventing his own tunings. Every few weeks, he would change the notes on the karimba, until it played the kind of music he wanted to play just then. He would play the karimba in its new tuning for a few days and become comfortable with it. Then, he would record and videotape an improvisation on that new karimba tuning.
That is how we got SaReGaMa Lotus, Air, and Freygish tunings.
If you have a Freygish-tuned karimba, I have a treat for you!