Customized version of http://www.thingiverse.com/thing:26596

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=26596

Using the following options:

box_z = 60
box_y = 120
box_x = 120
struts_number_z = 3
struts_number_y = 3
struts_number_x = 3
sides_angle = 30
struts_width = 3
pad_heigth = 0
pad_radius = 10
frame = 5
thickness = 3
bottom_angle = 30