I still do this in FCP7, and it works well.
If your timecode is completely sequential, you can drop your clips into a timeline, set the timecode of the project to match the first clip and use the timecode generator in FCPX.
My problem is that my Sony HVR-Z7U misses about 37 frames of timecode with each clip it creates, so I can’t do this.
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Don’t live your life in a secondary storyline.
Mark Morache
FCPX/FCP7/Xpri/Avid
Evening Magazine,Seattle, WA
https://fcpx.wordpress.com