Creating Concave Groove/Scoop on Object

Hi all,

I’m wondering what the best way to model a “scoop” or concave groove within an an object (see attached).

I’ve got the majority of this thing modeled, but getting stuck on how to best create that bottom lip right below the black covering.

lock3.1

Thanks in advance!

You can achieve a variety of complex shapes using the boolean modifier.
Then you can clean up the topology and prepare the model for the Sub-D modifier.
Or you can just avoid cleaning the topology altogether, and use the Remesh modifier instead (like I just did):
example1.blend (180.6 KB)