Question Remote control precision aiming device

[martanpan]

When I go to my local bar, to watch NFL Sunday games, my bartenders are always struggling to switch channels for different games. A reoccurring problem is switching one TV to a different channel, and the 2 adjacent TVs are switched as well. I have read that a precision aiming device may be helpful in this situation. I have seen such a device be used successfully at OTB places. My question is - what is the easiest way to construct one and mount it to a remote control?