I have the cabinets assembled and the drawers are built. Here are a few
shots of the details of how the drawer divider rails fit into the side
dado's along with the slide spacers and slides in place.
AND the parts for the tops of the cabinets. Just a few Domino's.

https://www.flickr.com/photos/lcb112...posted-public/

https://www.flickr.com/photos/lcb112...posted-public/

https://www.flickr.com/photos/lcb112...posted-public/

https://www.flickr.com/photos/lcb112...posted-public/

I like this method of indexing the spacing of the divider rails and the
slides using the dado's. A big time saver and pretty much fool proof.