Here is a sneak preview of a new visualisation of when New F conversions (and other 777/747 maintenance) have taken place at Cardiff CWL:
ftdashboard.net/overview/cwltimeline.html
The graphics uses HTML5 canvas drawing and should therefore work with Firefox, Chrome and Safari. IE9 should be fine, too, while the interactivity with mouseovers may well be problematic for earlier IE versions.
This timeline page is not yet linked from the ftdashboard homepage nor navigation (but this will be done soon unless feedback suggests otherwise).