Haven't gotten a chance to print this yet. Was a general purpose shelf that can be affixed using 3M double sided tape.

desk_shelf_simple.stl - Heavy duty (1/4" thick walls) and first attempt.

Desk_Shelf.stl - cleaned up version with 1/8" thick walls and a hole in the back for cables

Desk_Shelf_Light.stl - same as desk shelf with some diamond shaped holes cut in the sides and some of the lip cut out to reduce filament usage.

support only needed from build plate for any of these prints.