Thanks for the tip. Do you know specifically what triggers the CE light in the air pump system? I am trying to understand the system so that I can perform any and all checks that I can before taking the plunge. I will try your check next week. I know the pump does make some noise now, kind of like a subtle bottom-end motor knock, but I suppose it could be a sign that the pump has restricted output as you suggest. Then again, it could be about to grenade. Thanks again for the tip!

- Kevin