Kindle Paperwhite Hard Shell Case

I prefer using my Kindle without a case, but wanted something to keep it safe while stashed away in my bag. Instead of buying a fabric sleeve, I decided to make a hard shell.

There are two versions here--one for a completely naked Kindle Paperwhite, and one that is compatible with mordr3d's excellent one-handed folding ring grip. (https://www.thingiverse.com/thing:2503235/#files)