I remixed this stand from the customizer. I made the frame very thin, but sufficiently strong. I then modeled in stabilizer wings that will overlap eachother to make the stand extremely thin, but portable. You essentially get double the width in stability with the wings, but half of the width when storing. I throw in in my backpack and sometimes forget it is there because it leaves no footprint.
** Keep in mind, if you want some more stability, you can scale up the Z axis in your slicer (when the model is flat) to increase the width. no matter the scale, They should always line up for storing.
*** I designed it to have a steep 35° angle so that I am not hunched over when typing. It makes the screen nearly eye level. The angle makes it so that the keyboard is obviously not at the traditional level; however, it is stable enough to type on and surprisingly not too uncomfotable. (as I am typing on it now) I wouldn't type a novel at this level, but it certainly gets the job done for most other things while saving your neck. I also typically use a separate mouse and keyboard, so I am less affected when typing anyway.
I used 100% infill. It was probably overkill, but It is SOLID. Makes me feel better using an extra $0.30 (literally) to make sure my couple thousand dollar computer is safe.