gamebuino shell case v0.42

This item is Shell-Case for gamebuino (http://gamebuino.com/).
Please output the following two STL files and assemble.

Bottom plate ; gmbn_shell_042_btm.stl
Top plate ; gmbn_shell_052_top.stl
http://gamebuino.com/wiki/index.php?title=File:Gamebuino_r2_cad.STEP

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I had forgotten to fix "gmbn_shell_042_top.stl" that should be improved.
And I modified and added the following two files.
gmbn_shell_043_top.123dx
gmbn_shell_043_top.stl

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I improved Top plate.
gmbn_shell_052_top.123dx and gmbn_shell_052_top.stp
gmbn_shell_052_top.stl