Got a great tip from a friend... You can work natively in Final Cut Pro X. You just need to change some settings to overcome its desire to eat up disc space. Start by launching Final Cut Pro X. Be sure to keep an eye out for Abba Shapiro's forthcoming title.
You need to adjust how media is played back as well as rendered.
- Choose Final Cut Pro > Preferences.
- Click the Playback button.
- Uncheck the Background render box.
- Check use original or optimized media.
- Set Playback Quality to Better Performance.
Now it's time to adjust how media comes into the system.
- Click the Import button.
- Uncheck Create optimized media.
- Uncheck Create proxy media.
- Uncheck Copy files to Final Cut Events folder.
- Close the preferences panel.
There you have it... looks like its possible, it just takes some extra work to disable the many preferences that will want to transcode or render.