Customized version of http://www.thingiverse.com/thing:241833

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=241833

Using the following options:

retainer_factor = 6
tab_length = 20
neck_thickness = 2
tab_thickness = 5
thumbwheel_height = 6
cable_diameter = 5
plane_cut_factor = 1
tolerance = 0.4
$fn = 50
show_seperate = no
table_thickness = 19.9
holder_thickness = 6
grip_height = 0
grip_width = 4