So I'm trying to make a keyboard lapdesk/lapboard since the ones online that are premade aren't the sizes I am looking for. I am currently using a pretty heavy wooden plank from a roll-out desk (unattached) with a mouse pad on it, so I am looking for materials that are much lighter because the weight on my legs/lap is starting to give me pain.
The idea is maybe I could just get a full-size mouse pad around 900mm by 400mm and then epoxy or glue a light and hard material underneath it that can support my keyboard and mouse on it, I've thought about using healing mats or carbon fiber but getting those in the dimensions mentioned is pretty tough any ideas?