Smooth-Fit USB Organizer

After printing a number of USB/SD/MicroSD organizers I realized a few things:
The USB fitment wasn't there. I needed it to be snug enough to turn upside-down, but easy enough to pull out that one could pull it out one-handed without picking up the whole bunch in the process.

So, I designed a socket that used the USB square holes to hold the stick in place, while allowing for smooth insertion and removal.

I also realized I didn't really need the SD cards on the same organizer, so it's USB for now.
I'll be including the source in case people want to take the basic socket and do other things with it.