Thank U, I learnt a great deal doing is, altho U can't see my shading lines well, I did use them to shape the face as instructed. I always seem to have a hard time with the jaw and chin although it looks much better than normal here!

I overdid his frown lines but I loved using a bit more detail here to actually get an expression! I have a David  statue at home and always draw his standing pose, Michelangelo was a genius to do that in marble, how incredible he was.

Any advice always very much appreciated, I am a serious student of art, starting in my 50s just 18months ago but I'm obsessed and keen to learn from any mistakes and advice. Thank U Teach!