Vertical laptop stand that adjusts to your laptop thickness. The raised center section flexes under the weight of the laptop, causing the main brackets to close and hold the laptop firmly. Designed for laptops up to 1" thickness. Fits my Dell Precision (XPS) 13" perfectly. Very stable. This design will also print on smaller printers as it is 3"W x 4"L x 4"H. Video link below:
https://youtu.be/8X78vBueSUY

I've created two updated designs as remixes - one for thinner laptops and one for heavier laptops. Hopefully these designs resolve some of the problems and failures observed on the original.

V2 for thinner laptops: https://www.thingiverse.com/thing:6328125
Heavy Duty: https://www.thingiverse.com/thing:6328126