Stephen and Phil,
That’s the rub, isn’t it? When we purchase Commercial Off the Shelf (COTS) tech, be it hardware and/or software, it’s usually closed system. These COTS systems do not usually lend themselves to modification. One would either have to buy into an open system (hardware and software) or completely DIY, from the clickers to the programming. Alas, this is either beyond many’s abilities or more investment in time and energy than desired or available. Open is great, but to modify requires a completely different level of commitment, set of tools, and set of skills.
Jim