This version is probably easier to see the various elevations. It does not have the editing the color map above does - no incise flow, filling basins (multiple times), smoothing (multiple multiple times), and rivers. This is the map just after the script finishes.
Elev_using base sel.jpg

And, for comparison, here is the original base map, with no changes. I am flipping back and forth between the two, and can't quite decide if I'm happy with how it works, or disappointed it didn't do more.
Base_map.jpg

I should probably run it through more paces before deciding. Bounce it against a few more random worlds, see if it works right or not.

(PS - It's a good thing I previewed the post before submitting... the images were in the wrong order. )