Disklavier

(I am on the road so please send me direct email to azornes@...)

I have almost the same configuration as you (mine is DC6A Mark III with DKC-850 added on)

Yamaha DK support patiently walked me thru the process over the phone in real-time plus retired Yamaha super tech BillB sent me url for PDF

I wrote up my simplified (for non piano technician people like me) and will happily send you that document ...  there are a few steps in the “official” documentation which could be clearer ... so I added my notes to those steps

—Aaron in San Francisco