Don, I did a test with Gopro in Edius--using the 3D subfile that is created from L/R videos, and I must say, the difference is minor. In fact, you save the intermediate render so the images are cleaner. I don't want to muddy your waters, but the Edius Pro 7 trial is 30 days and you get the full app. You might try it, and see what you think. That said, if you really have a crazy walking video like my gopro videos walking down the driveway, or to avoid wing flapping on extreme wide angle, then Mercalli is better.