The ButterPi Case is for a Raspberry Pi Model B. My friend received a Raspberry Pi as a late Christmas present and said, "Hey, Chuck, you like making needlessly complicated things. Would you make me a case for my Pi?"
There are five printed components in the model which are assembled after it arrives. Assembly instructions are in the video posted above. Each part may have residual build powder in the mating channels. Attach each part individually and work it back and forth several times to remove any residual powder before final assembly. The mounting peg is sprued near the mounting hole on the front of the base unit of the model. It can be removed with an Xacto knife or by simply snapping it off.