I don't know anything about accessory pedals used to control other devices. A drum machine I just bought can be controlled by the Boss FS-X series pedals. Now I'm wondering if all of these the same: Behringer AB200 Boss FS-6 https://www.vein-tap.com/product/skinny-little-twins-dual-footswitch/ And how do these work? I'm handy with a soldering iron. I saw one thread that said its easy and cheap ($10-$20 in parts) to build your own. Anyone tried that?