This a smaller version of the Pi Box. Many people liked the idea of the original Pi Box, but didn't have a large enough print bed to actually print it. Here is a smaller version that is designed for the Raspberry Pi B+ along with a few variations that will hopefully spice things up.

Besides your Raspberry Pi B+ you'll want the following.
External USB hard drive
One SD card (minimum 4GB class 4)
One short panel mounted hdmi cable (978)
One short panel mounted LAN cable (909)
One short panel mounted USB Cable (908)
One short micro usb male female cable extension
One 16mm switch (917)
One 5V 2A micro USB transformer

The numbers above in parentheses are part numbers at www.adafruit.com and are given as examples. You can almost always find them cheaper on either Amazon or Ebay.

I'd like to warn everyone that I have not printed this. This design is for all the people who liked the Pi Box, but couldn't print it without getting a much larger print base. Any comments or concern would be greatly appreciated.

Print:
1 Base
1 Divider
1 Grill
1 Top
Additionally you can print:
1 Expansion Top
1 Expansion Cover

The expansion top and cover are for projects that need additional space. Originally I thought I would use it to house a USB hub and a small fan.

Mount the Raspberry Pi B+ and the panel mounted cables.

We'll be combining the micro usb extension cable and the power switch so that we can turn the Raspberry Pi on and off using the front button. The female end of the cable will be mounted in the rectangular opening in the back of the box. Measure out enough cable from that end to reach the switch terminals at the front of the box. Strip back the insulation on the cable at that point and cut one of the wires (preferably the positive one if you can...). Now solder those freshly cut ends to the switch terminals. Plug the male end of the cable into the Raspberry Pi.

Position the divider and mount the external hard disk to it using double sided foam tape (This not only makes it easier to mount, but also gives the HDD a foam shock absorber. Position the grill and top cover.

I've purposefully avoided using any type of fastener (other than foam double sided tape...) to keep the case together because of how inconsistent 3D printed screw threads can be.

Enjoy