That’s how it’s supposed to work, but from a certain point onward the films fall drastically out of sync from about halfway through to the end. It’s been all three prequels, even though I never changed primary sources for Ep1.
Even if a ‘reconnect media’ worked perfectly at this point, it wouldn’t align with me fixing it manually before.

Supposed to be easy. And if this was a fresh project that I did correctly and straightforwardly, it probably would be. I have so many nested sequences for the prequels, which I now know is a supremely bad idea for FCP7. It crashes very often when any of them are opened, no matter how much I clean out of them; those nested sequences are just part of what has to be there to get the projects up and running. If I did want to go back, I might as well create the whole video stream from scratch, manually searching for each shot or section between edits and painstakingly checking everything, and I don’t have it in me. Not after just doing close to that for V6 for 2 and 3.