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The faderknob of the
DJM-1000 does not differ to much to that from the
DJM-800. You can order one for a DJM-800 and fit it on the 1000 without a problem.
The official Pioneer ordercode for the DJM-800 crossfader knob is : DAC2371
Can't seem to find the code for the DJM-1000 though, but this one should fit.