Re: Has anyone used FCPX to cut a proper documentary for broadcast.

I'd be interested in this too, though your workflow (whilst perfectly fine) is 'traditional' in it's conception. With X having no tape layback, you'd be looking at doing this some other way - I've always let the dubbing mixer layback audio on the master, but I guess in X you'd need to export a final QT, and use something like Blackmagic's Media Express for layback to SR. And you'd be looking at roles for export to ProTools rather than tracks (seeing as there ain't none!)

As to how well broadcast safe filter works - well that would be a test, assuming it's not going through a legaliser.

I can see no reason why it shouldn't work - but as you say, living on the bleeding edge can be a precarious place. It hurts when you fall off.

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Before you criticise a man, walk a mile in his shoes.
Then when you do criticise him, you'll be a mile away. And have his shoes.

*the artist formally known as Jaymags*