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:

extension_screw = 2
mount_angle = 90
fan_screw = 2
mount_screw = 2
extension = 1
screw_spacing = 50
extension_mount_angle = 90
mount_position = 15
extension_length = 20
full_plate = 1
mount_length = 12
fan_size = 60