Currently Being ModeratedApr 24, 2012 1:53 AM (in response to saddact)
There is a way to work with nonstandard frame sizes in FCP X, as is detailed here:
You basically have to generate a clip (really, it can be anything) with the desired size, then import it into FCP X.
You open such a clip in its own timeline (control-click, "Open in Timeline") and edit your content into it.
Don't create a project, just edit inside the clip's timeline and export from there. Projects can't have arbitrary sizes, but clips can.
Currently Being ModeratedSep 9, 2012 2:56 PM (in response to saddact)
I know your question is solved. But still, be sure to also try this solution by the great Alex4D
Create timelines at any resolution and frame rate