I was wondering on high pulse at what point can you no longer see the pulse. What I mean is at what dial setting does the pulse appear a steady arc. I think the potentiometer for my pulse nob is off. It takes until the 2 or 3 o'clock position unit I can't see it any more. Maybe they are all like this but it gets very sensitive toward the end like 75% of it's total settings are in the last 25% of the nob turn.