Just an update. The cams have been working for two days now with these settings: 15 fps, 7000 max bitrate, Variable and medium quality. Cams 1, 3 and 4 are at 2048x1536 and cams 2, 5 and 6 are at 1920x1080. I'm dreading what I'd have to reduce the quality to when I add another cam. Thanks