Print-In-Place Folding Laptop Stand with adjustable height. (Remix)

I printed it on my Ender3 v2 in black Gembird PLA. 

At first I printed with the same settings as zuberio recommended, but had issues with separation in the horizontal joints.
I was able to improve print by reducing layer height to .2, which improved tolerances.

Reducing wall width from .4 to .35 on a .4 nozzle improved joint strength as inner walls extend into joints. 
 

Printed with 5 top and bottom layers and 35% infill. 

Can hold my macbook pro, but would recommend more infill for heavy computers.