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:

bottom_length_text_box = 110
height_text_box = 10
bottom_width_text_box = 60
relief_height_text_box = 4
steps_text_box = 20
top_corner_radius_text_box = 5
relief_thickness_text_box = 4
top_length_text_box = 90
bottom_corner_radius_text_box = 5
top_width_text_box = 40