Hey guys, Thanks in advance for your response. I'm editing an enormous series of video right now that's on a timeline to get finished (one per week for the next month). It's been going fairly smoothly until now. Essentially I started with about 150GB of raw video shot on a Nikon D7000 at 1080p and 24 FPS. Obviously when FCPX was optimizing the media it started to take up way too much room so I bought an external hard drive (LaCie running off of FW800) and had FCPX reroute everything to there. Things seemed to be going smoothly until I revisited some older footage for inclusion in the project. I started to notice that not only the older stuff but the newer, already optimized footage, was extremely jerky on playback and I couldn't really use it as it was because of being unable to accurately place cuts and music. I tried making Proxy and Optimized media of everything again and it's literally been running for 12 hours straight untouched and has barely gotten past 14%. Here are my stats: 2.4GhZ 2008 Unibody MBP 8GB RAM, 500GB onboard drive with 150GB available. 1TB LaCie & 2TB G-Tech both running via FW800 separately. Any ideas how to get this stuff to stop being so jerky and stop taking days to optimize? I can't spend another day waiting for it to wrap up and it's clear that today wasn't even enough. If you've got any tips to streamline this whole process that'd be great too, I'm pretty new to FCPX. Thanks in advance.