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At the 2:36 mark, one has a limited view of Doctor P's mixer. One can see a single button below the field of blue buttons on the left-hand side of the mixer. The DJM 800 has four smaller buttons there, but one centered button is visible on that side of this particular mixer. This would make it more like the 900 Nexus than the 800.
The source and notes on this submission are correct.
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