I’m having too-large project file issues as well in FCP v5.4.1. (Out of Memory messages, long save times, etc).
It was suggested to me that I split my project into two files, which I did in the following way: I made two duplicates of the original 300MB project file, and retained the original. Then, I opened each duplicate in FCP. In duplicate A, I deleted half of my sequences in the browser. In duplicate B, I deleted the other half of the sequences. But, even though each of the duplicates now only had half of the material of the original, they each stayed at 300MB! How the heck can this be?
Larry Mondi
Larry Mondi Productions
Brookline, MA