I just saw this device today. I want one for a different purpose than writing. I want it to press keys on a keyboard with an empty "pen" and optionally to slide the same pen over a trackpad to move a mouse. The keyboards that I use are flat and exactly 11 inches wide, which is the X-range of the device. The other range of the device is 8.5 inches which gives me precisely enough space to put a trackpad under the keyboard. It's highly serendipitous in that regard (a perfect fit). I will do my best to try to find a way to make my own "subroutines" so that, for example, I can call one called PressA() and it will go press the A key. Has anyone done anything like this already, or am I solving a novel problem here? If I'm the only person with this problem, I will invent my own software to make this work, but if someone has done this, please tell me.