I own a HP Laptop Pavilion 15-e027ca Notebook. When using it on my lap, as it is designed for, there is no conveniant way to use mouse. I used two "channel" 3/8 x 3/8 inch bars and hot glued them on the underside of the laptop, then made a shelf fron a thin piece of plywood 61/2 x 14 inches which slides in the grooves. This slides in and out, and on which I can use the mouse, and also as a support for a writing pad. I think that this could be refined and used.
reg727