I am trying to come up with a supply list to finish my cabinet design.... i will then need to come up with a Elligable and easy Option for my Concept CP, I have no idea what a ecoder is exactly and I have read many pages on information, can someone please explain which one what would be good for 40+ buttons 4 joys.... and how it works, connects and is installed / programmed........ it would be of Great help to me... Thanks OTRA,