Customized version of https://www.thingiverse.com/thing:2708669

Created with Customizer! https://www.thingiverse.com/apps/customizer/run?thing_id=2708669

Using the following options:

case_type = custom
feet = none
attachment_type = nothread
rib_type = outer
bolt_size = 2.5
bottom_board_cutout = include
top_board_cutout = exclude
middle_board_cutout = exclude
top_cap = include
end_caps = include
vents = exclude
custom_width = 31
custom_height = 20
custom_length = 52
pcb_height = 1.6
wall = 1.5
hole_shrink = 0.85
pcb_clearance = 0.3
hot_insert_clearance = 0.25