I can feel that project meditation material is very powerful and the demo worked well in terms of a great experience, coming out refreshed with much greater sense of peace and focus, just what I was looking for. However, the demo having made me want to go further, I've found that levels 10 & 9 somehow take me in a different direction, with unsettling disturbances in my head, reflected as a feeling of unwellness in my body. This so much so that I'm put off using the material. I use earbuds which give good bass response with good overall sound, and have cut sessions down to 20 minutes which doesn't really help. I'm wondering if it's the multiple types of simultaneous stimulation which is causing this. I did have a similar response to another (teaching) program which used multiple techniques, but it's only just occurred to me, that was the case previously, which I used for many months. I just assumed it was par for the course at that time. But now I'm wondering if there's a similar pattern as binaural beat material often seems more amenable and helpful without ill effects. I was looking for suggestions to use the material where it's effect may not be so strong in some way, in case that might help, or any other pointers. Big thanks for any input on the above.