I re-read it and am wondered if you could clarify the following..
(1) Regardless of wether I check 'use previews' or not, PP will render the timeline again. Regardless of wether the timeline is already rendered. Correct ?
(2) By previewing, do you mean playback of your timeline ?
Ultimately, I'm looking for a quick way to export the timeline into a quicktime file for playback outside of PP. This can be a mov, mp4..etc.