Customized version of http://www.thingiverse.com/thing:102974

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=102974

Using the following options:

hook_and_front_thickness = 4
first_hook_offset = 65
hook_style = rounded
number_of_hooks = 2
inner_hook_buttress = 0
top_and_back_thickness = 2.75
width = 30
clip_length = 55
hook_distance = 60
hook_radius = 15
clip_depth = 25.4
clip_angle = 1