Customized version of http://www.thingiverse.com/thing:1040899

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=1040899

Using the following options:

label_width = 6
label_length = 15
top_thickness = 0.4
number_of_cables = 1
floor_thickness = 1
inner_spacing = 0.05
wall_thickness = 1
opening_width = 1.1
cable_diameter = 1.2