Is it better to put in a new tank stainer or is cleaning the old one good enough?

I have been using biodiesel for about a year now, so I figure the strainer is probably pretty gummed up. I have also developed a fuel leak about a week ago in the rubber return line at the tank. So I have to replace that line and the supply line. I figured I would tackle the tank strainer since I have the system open anyway and the car in the air.

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