I remixed the original file, which is awesome already, but I made two new versions keeping the same design.
It works flawlessly.
No supports required
Infill as desired, but less than 15% and you get a very light stand (not so good)
folding_stand_v3_larger.stl | 2.3MB | |
folding_stand_v3_wider.stl | 2.9MB |