banana pi 3D design file download link:
https://drive.google.com/folderview?id=0B4PAo2nW2Kfnfl95clI4ZzRKUmRENWhMcmwzUlVrYW1Ic3BXZENtUjJQcjk5TXc0RHBKdlU&usp=sharing&tid=0B4PAo2nW2Kfndjh6SW9MS2xKSWs