Customized version of http://www.thingiverse.com/thing:204007

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=204007

Using the following options:

fan_screw = 1.7
fan_size = 50
mount_length = 15
extension_length = 20
extension_screw = 1.7
mount_position = 15
screw_spacing = 40
mount_screw = 1.7
mount_angle = 90
extension = 1
extension_mount_angle = 90
full_plate = 1