In setting up my own K3 & KPA500 for remote operation I have to make up a new interface cable from the K3 to the KPA which includes an additional wire for remote on off. It is basically a VGA cable with a wire added. How have most of the users here made up this cable? From scratch with a set of DB 15 connectors, or modified an existing VGA cable if you can get into the connectors as most of them are molded?