Thank you gents. I must apologise about the photos, I got my DSLR out, only to find I'd left it turned on and the battery was flat, these are from my camera phone.
Les,
I can see what you mean, although I did deliberately over-burn the knot area just to give it added texture, maybe a little too much.
Pete,
The turning is easy but I don't have your touch for composition, so thanks for the suggestion.
Wider,
I don't think you're far off, just concentrate on the flow of the curve.