Customized version of http://www.thingiverse.com/thing:1919744

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=1919744

Using the following options:

handle_radius = 1.5
spacers = 8
skip_after = 0
inner_section = 5
hole = 6.15
hole_shape = 0
screw_head = 5
angular_spacing = 75
screw_hole_radius = 0
double_helix = 1
clearance = 0.5
reinforce_thickness = 16
minor_hole_radius = 0
radial_spacing = 75
inner_thickness = 5
backlash = 0.1
spacer_style = 3
mod = 2
teeth = 16
handle_height = 20
thickness = 10
generate_screw_hexagonal = 0
generate_handle = 0
details = 0.25
hole_height = 0
spacing_radial_shift = 0
reinforce = 10
generate_screw_hole = 0
enable_inner_section = 1
helix_angle = 0
screw_support = 0
pressure_angle = 20
auto_hole_height = 1