Customized version of https://www.thingiverse.com/thing:26596

Created with Customizer! https://www.thingiverse.com/apps/customizer/run?thing_id=26596

Using the following options:

box_x = 65
box_y = 65
box_z = 40
frame = 10
thickness = 3
bottom_angle = 45
sides_angle = 45
pad_heigth = 0.5
pad_radius = 10
struts_number_x = 7
struts_number_y = 7
struts_number_z = 7
struts_width = 3