So, the first lesson is that the 81 crawl is not missing a frame at the end. It is one frame off in every version I have. But, the 35 mm released with the SSE, had a duplicate frame in the middle. Really messes things up when you are trying to align things. Fortunately I caught it before I had really gotten started. I now have the first real alignment done - making sure the frames line up before I export the frames as png. All the laser bolts and white flash frames are now aligned so I can just mix the frames with matching numbers. I’m using the Blu-ray as the base layer and then I’ll line up the blockade runner and star destroyer on that, cross referencing with the 1977 35 mm flyover.