My modification of the Raspberry PI Model B+ sleeve designed by walter to add a cutout for the IO Expansion connector.
The modification was done by importing the origional STL file info openscad and adding / subtracting a few blocks to achieve the desired result
Print one of Raspberry_Pi_B+_Sleeve_v1-1_CAP.STL to provide your end cap.
Printone of RasPI_B+_sleeve_io_cutout.stl which will ggive you the vented sleve with the IO expansion cutout.
io_cutout.scad is the openscad source file that imports Raspberry_Pi_B+_Sleeve_v1-1_VENTED.STL and makes the modifications that can then be exported as RasPI_B+_sleeve_io_cutout.stl