Thanks for the info. I'm just going to master in 1080 prores. I did some reframing and blowups on the FCP 720 timeline. I'm now re-rendering my footage to 1080 and reconecting the media in FCP, and I was hoping to do the blowups from the 4ks so that I don't lose resolution. Clipfinder has a bit of a crop window, as does Redrushes, but it seems a bit clunky. I't would be nice to pull a frame from FCP and match it to the 4k outputs to 1080.