Previews indicated it was working as I hoped so I stopped for the night. I opened the project today to continue, per the directions here about right clicking timline and selecting "edit in multicam" and on all three files where I had saved progress on the project my camera #4 clips are all piled one after the other at the beginning of the timeline (on two of the files one or two clips stayed where I had placed them) and all points in the video where I had clips from camera #4 (except where the clips didn't move on their own) are just a black screen. So disheartening. Am I doing something wrong, is there a button I should be avoiding to have this happen, or is this the mother of all glitches? None