This is a remake of https://www.thingiverse.com/thing:4082313

While I found it to be a great file and design my requirements needed some tweaking. I found the model to not have enough width or lower arm length for my 15"x9" laptop, so I extended both. The other key problem for me was the access hole on the lower arm was not big enough to accommodate a screwdriver. After I extended the lower arm I added another access hole and expanded both. I also smoothed all visible edges and added countersink holes for both screws.