Customized version of http://www.thingiverse.com/thing:735213

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=735213

Using the following options:

wall = 3
chamfer_depth = 2
tube_diameter = 22
arm_end_diameter = 5
height = 15
quality = 80
inner_diameter_backlash = 1
spool_diameter = 53
arm_compression = 1
number_of_arms = 5
arm_thickness = 2.4
collar_thickness = 2