Hi, How often do you check your gas tank plumbing and tygon fuel lines? I assembled my tank last fall with tygon tubing and flew the airplane about 5 times. Now I 'm getting ready to fly the plane for the first time this season and was wondering if I should replace the tygon with new. It is a slight pain to remove everything to service the tank but I would kick myself if I developed fuel delivery problems. What do you guys do? Also I have some Aerotrend gas tubing that has a larger inside diameter than the tygon. Is the Aerotrend less likely to get brittle and stiff?