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

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

Using the following options:

top_width_text_box = 42
bottom_width_text_box = 50
relief_thickness_text_box = 2
top_corner_radius_text_box = 5
top_length_text_box = 52
steps_text_box = 20
bottom_length_text_box = 60
height_text_box = 25
relief_height_text_box = 2
bottom_corner_radius_text_box = 5