Ok. Has anyone had this work with 6055? The update is when I hooked up some external 12 volt power supply the circuit it works fine and the LED blinks as it should. When I hook it to the powerhead it doesnt work as predicted. Sometimes is erratic, sometimes its turning on and off every 25 seconds, the potentiometer has no effect on the power being supplied to the powerhead. It only suggests that the female DIN-5 connector is not connected rightly to the DIY wavemaker. If anyone has done anything with 6055 and the DIY unit I would appreciate some help. XTM are you still around??