Foldable Laptop stand

I like to be able to use two screens at my desk at work, so I designed this folding stand that I can stand my laptop in to give a two screen setup with my monitor.

I've made it foldable to make it smaller so that it can fit in my bag at the end of the day.

I printed it in Black PETG, after numerous warped attempts in ABS. I didn't try PLA as I didn't think that that would be strong enough.

My Dell Latitude E5450 fits nicely with the arms separated by 220mm.

To complete the stand,