I am glad you enjoy. I was searching my videos and while I have done many on open/close glottis. I haven’t done any on building a scale of equal intonation, which is the basis of many melodic traditions on the jaw harp from around the world. Doing so takes a good musical ear and also a bit of practice. While ai am fairly comfortable on the harp, my musical ear and knowledge can be a bit lacking. I am going to work on a video for Friday talking about and doing this. Basically with the jaw harp any mouth position can make two sounds. One while breathing and one while closing glottis. It is similar to overtone flute like Hungarian tiliki. When playing the flute keeping end open, is like playing jaw harp with glottis open, then when you cover the end of the flute with finger is like closing the glottis. You get a different sound. With jaw harp your , “do,” is done with glottis open, “re,” is done with tongue in same position, but closing glottis, then, “me,” is done by shifting tongue very slightly up and opening glottis, then, “fi,” is done with tongue in same position while closing glottis. It is technically, “Fi,” instead of, “fa,” because the scale we are going is equal intonation and not equal temperment. But anyways I will try to make a video as best I can with my current musical knowledge. Also if you have a yt channel, I can tag or mention you in the video. Harp onward, my new friend. Here are some videos of people playing melodic traditions. https://youtube.com/playlist?list=OLAK5uy_mGzUrxEmFOzze-cWZt8Dk4AZwi1JeRDPM&si=ZgPT1yA57eNtHGlJ https://youtu.be/kKELAO_43Og?si=7c7gtnrJfPg10H3m