Congratulations to the team, again - I found the Speedlite Flash Facts article most illuminating, and also the article on Tonal Tweaks. It was good to have some tone measurements illustrating the different effects possible. All I need to do now is to choose the optimum setting when faced with a difficult shot. That will be more difficult - perhaps I need to make use of C1 and C2 to have the options instantly available when out shooting.