These just apply straight +12V to the outputs when switched on right? I'm guessing pressing the Scan-Lock button with a small screwdriver/paperclip just applies +12V to the Scan-Lock wire going to the TA? If so, it should work just fine with my SoundOff Signal TA, which just needs +12V applied one of four wires for left/right/warning, and a momentary +12V applied to a "pattern select" wire when setting it up, which would connect to the Scan-Lock wire. In other words, there isn't any fancy switching circuitry in the controller itself, it's just a box of switches, right?. If anyone else thinks this would probably work, I'll take one!