Brian, Like you, I feel that the key is moving and filtering the fuel. I built up my fuel polishing system with a 12V Walbro pump and a 12 hour timer. I like the 12V system because I can easily run it while underway. I generally run it once a month at the dock and after taking on fuel, for a 12 hour session, so I don't see the benefit of an automatic, programmed timer. When we take our first cruise of the Spring I can usually count on getting tossed around a bit at some point in the trip. That's the day that I like to run the FPS underway...while the tank is being agitated. I estimate that my system will turn over my tank 3 or 4 times in a 12 hour cycle. The other thing I did was to install a drain cock at the bottom of the tank so I could sample the fuel there. This gives me an opportunity to asses how much water is present ( a throwback to my private pilot days). Regards, Randy Pickelmann MORNING STAR