Hi Phil,
Thanks for the comments. I'm glad its proving useful.
I'm not quite sure why you refer to the SSIS dev team as MY dev team. if only that were true - I could get them to do whatever I wanted :)
Anyway, container duration is a funny one. I went thru alot of pain trying to get functionality added into SSIS that would enable us to log ContainerDuration in this way but unfortunately it just wasn't possible. They nearly (tiny gap between thumb and forefinger) achieved it - but not quite.
In the meantime I devised an alternative method here:
Workaround to the System::ContainerStartTime anomoly - derive the execution duration of a container
(http://blogs.conchango.com/jamiethomson/archive/2006/01/16/2620.aspx)
-Jamie