Customized version of http://www.thingiverse.com/thing:511489

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=511489

Instructions

Using the following options:

bottom_width_text_box = 60

top_length_text_box = 40

bottom_corner_radius_text_box = 5

top_width_text_box = 40

relief_height_text_box = 6

bottom_length_text_box = 60

top_corner_radius_text_box = 5

relief_thickness_text_box = 4

height_text_box = 60

steps_text_box = 200