Raspberry Pi B+ Case With Fan

I made two changes to the design to make the top print better. First, I added to the parts that go between the USB and Ethernet jacks. The ones in the original design broke off. Adding the triangle of material made them sturdier. Second, I widened the air ports in the back. They were so thin in the original design that they fell right off when I touched them. Now they are meatier, and print better.