Disklavier

I didn't get a response to my first try at this question so I'm reposting:

Does anyone know for sure if the DKC-850 will work with the Millenium (year
2000) DC3 Pro?

The Pro sits sort of between the MKII and MKIII (though it's mostly an
upgraded MKIII in functionality) and it uses the DKC500RW controller which I
believe was only used by this enhanced resolution model.

I love the piano, but the controller now feels like it was made 40 years
ago. I have so many work arounds to use it in my studio and I'd love to get
it up to date controller-wise, but can't tell from everything I read if the
DKC-850 will in fact drive this particular piano model or not.