Hi both, thanks for your thoughts. It seems to be the lower notes that make my jaw move back so it’s not the same as what John used to do on higher notes. I think what I need to do is more like what Steve describes. If I play low notes with a recessed jaw, then try to go up a couple of octaves, my chops are in the wrong set up, so keeping my teeth aligned means that there’s much less movement in my lips over the same 2 octaves. Yesterday’s experimentation suggested that there might also be an improvement in tone and control, so it’s definitely something worth sticking with for a bit to see where it takes me. Thanks!