Just eyeballing the photos, it looks like the master section is the four modules at the right of the console, two for stereo master, CR monitoring, talkback, phones, and hopefully some kinda oscillator, and subgroups and returns are on the two modules between the stereo master and ch16...looks like the group levels are rotaries rather than faders. I get a kick out of the simplified patchbay too, it's like a Little Big Console!