Jo, you are psychic – 10/10 answer, thank you, I could not have put it better.

Eric, stick with the sensations of freedom and recognise where you lock up and recognise where it is free, then take a snapshot of your SHAPE. Close your eyes, hum, replicate the feeling when playing. Yep, I’m a scratched record!!! 🙂

I don’t know whether you have ever seen a video of the vocal cords working… not particularly attractive BUT you would never ask to watch a video to see what someones vocal cords are doing when changing pitch singing and try to replicate that so I suggest let’s steer clear of it here too.

Cheers, Greg