Secondary Axis, X-axis spacing (time units)

Hi,

This might be easier to follow if you take a look at the attached jpg. Basically I have a plot which uses a secondary axis. I want the data to fill out the x-axis and leave no spacing. The fact that the units are time might complicate things a little. By right-clicking on the axis and manually entering the scale (e.g. 0.357638888888889 for the left limit) I can get the line chart to fit as I want (see the right hand side for the black and red lines). However the secondary data doesn't follow on and a gap remains (see the blue area).

Any ideas?

Thanks,
Martin