I just mounted the 880' footboard, heel plate and cam on the Eliminator :)
The 880 heel plate's screws fit perfectly in the Eliminator Powershifter's holes.
I think it's even possible to mix the 880 and 2000's hinges, to use the Eliminator heel plate and have a less shaky footboard. The spacings are the same almost everywhere, it's very interesting to see the similarities between the two pedals.
The pedal feels so good now, so light and fast, like in the old days :) Very happy with it...!