Thank you for sharing Paul💜I've heard about the c shape before, and loved the technique right away. What I`m about to say is not voice science but I do perceive that sound as if it had a pinch of operatic sound quality in it, and I like that - maybe it`s because of my European cultural roots:-) I never liked the expression `sing forward` it always caused tension in my throat, to me it feels like screaming without taking good care of my vocal tract:-) Looking forward to working on the c shape concept in class!