I don't use a "case", as much as I have a recording bag. That recording bag is set up with divided sections. Those sections are defined by what we had available a decade ago, from the Target retail stores, a welded wire kitchen shelving rack. The bag is a fishing tackle bag that I've used for recording for 30 years, a Rapala bag from Walmart.
The sections are defined by the wire rack. The microphones drop into the section that is padded by the outside pocket. The recorder goes into the midle action, which is protected by wire grid, and, the recorder is also wrapped in an old towel, and put inside of a padded zipper pouch "lunch box". In the recording bag, it is also padded on its other side by a 1" thick piece of fairly stiff kneeling pad foam.
Ultimately, the recorder is deeply buried in protection, and, well padded.
I've taken a few pics of it packed, as I do not have any in that state of rest. check back in a few.