I am making progress albeit slowly, as is my usual m.o.
One of the advantages of doing this blog, is that it shows me where I need to work further or where I have made errors. For example, the streaks of colour which are to suggest movement, need to be at the same angle to 'ring true'. In some of the coloured bands of blue/purple, which I did separately, there was a slight difference in angle, which did not look right.
After photographing the painting for the blog, it showed the obvious fault, and I was able to correct it before I had finished the session.