My 2nd practical model. Designed in Blender, printed by Creality K1 SE in Sunlu Sunny Orange PLA+, used by me.
The slot is 18mm wide and slightly wider than my 16" MacBook Pro.
Printed with 3 walls, 15% infill and tree supports.
The supports were relatively simple to remove but some had to be sniped / cut using the Creality filament cutters and teased out of some of the octagonal holes.