I have a Draper motorised screen which I bought second hand; it just has a manual up/down switch at the moment. I'd like to integrate it so I can use it with my Logitech Harmony controller, but to do that I clearly need to add a switch that can be controlled by the Harmony. I've seen Draper have a Control Box which all sorts of options for controlling the screen up/down, so it is arguably overkill, also it seems difficult to purchase when not bought together with a screen. Something simpler would also do the job, but I'm struggling to find Harmony compatible solutions. Any ideas greatly appreciated .