Customized version of https://www.thingiverse.com/thing:551484

Created with Customizer! https://www.thingiverse.com/apps/customizer/run?thing_id=551484

Using the following options:

part_selector = 1
external_length = 280
external_width = 240
base_height = 285
wall_thickness = 2.5
bottom_thickness = 2.5
external_corner_radius = 6
cover_external_height = 3
cover_internal_height = 6
cover_thickness = 2
cover_internal_margin = 0.5
cover_wall_thickness = 2
cover_printing_y_offset = 10