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

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

Using the following options:

tube_diameter = 20
spool_diameter = 53
height = 15
number_of_arms = 4
inner_diameter_backlash = 1
collar_thickness = 2
chamfer_depth = 2
wall = 3
arm_thickness = 2.4
arm_compression = 1
arm_end_diameter = 5
quality = 80