We're just from different schools of thought I guess, Phil. I'm not that into categorizing the tones. To me, the mixed voice is a blend voice of falsetto and full voice, at least that's what I understand from Brett Manning and Roger Love, two teachers I respect. For me, thinning out has nothing to do with blending a "head" and "chest" but lightening up as you go higher. I also see where many teachers refer to the falsetto as 'that's your head voice. Well, I think Robert Lunte summed it up best. head voice is a place, your higher register in which you can feel more resonant sensations in your head as opposed to your chest. I've heard my sirens too, haha, enough to give me a serious headache, but I don't agree with your take on me being a "mixed" sound, but that's my opinion and how I was trained. Regardless, I am not arguing, this is just my personal approach and take and even one of my own authors, James Lugo, would probably disagree with me. In the end, it doesn't matter because all this terminology has been changed so much between methodologies that very few teachers agree on what is what. But, as far as the way I teach, I have a certain approach that I plan to stick with;) Doesn't mean it is correct for everyone, but it works for my approach;)

PS- hope you don't think I am arguing or being egotistical, not at all. Love you Phil and respect your approach, I am just following what I've been taught by my coaches. Everyone has a different take and that is fine;)