Thank you for the reply. No specific question for now, trying to figure out if this would work with my setup. Primary objective is to make it less confusing for kids. Even though I have CPV2 running which displays buttons in use, kids keep pushing all available buttons. CPV2 is actually pretty neat when using with MAME it also displays button functions (i.e. jump, punch, etc). For emulators it is just a static image that shows where A, B, etc buttons are mapped. What I am planning to do is get an LED controller and run it with LED Blinky to illuminate ONLY buttons that are in use. This would be game specific for MAME, emulator specific for emulators. Just trying to see if this is doable before I spend $. Thanks.