Customized version of http://www.thingiverse.com/thing:580150

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=580150

Using the following options:

knob_adapter_structure_fine = yes
knob_adapter_height = 31
knob_support = yes
knob_wall = 5
knob_width = 25
knob_wall_stripes_size = 0.6
knob_adapter_structure = yes
knob_support_height = 0
knob_height = 34
knob_adapter_width = 6
knob_wall_stripes = 0