Thanks folks. Thilo, I think I have worked out the settings on the 60-40 i.e. use one dial to set the film speed and the other to set the power (?).

On the main 60CT-2 there are two sliders on the grip, again I think one is for ISO setting but the other, even though it controls the power is something I've not used before. The scale goes from 0 to 110. Additionally the CT-2 has the dial on the top as well so how do they all work together?

Gosh in comparison my 550EX is a doddle to use