Thanks for the vid link, RKA, which I have watched before.
May be I wasn't clear enough in my previous messages that my problem was with registering and cutting the mortises for the middle shelves, not the top and bottom. Even without the Dominoplate, I could cut those top and bottom mortises using what came with the DF500.
The video does not show how the middle shelves can be handled in the same or similar manner as shown in the manual. Or did I miss the usefulness of the Dominoplate here?