RE: Adding fuel line filters ...
Neil, its a matter of opinion--knowledgable people disagree on the issue. I'm with you, however, and do not use any filter between the tank and the carb. The fuel should be filtered, of course, but for that I use a filter on the bottom of the pick up line when the fuel is pumped into the plane. One thing that an inline filter can sometimes do is leak air that will likely cause the engine to not run properly; this problem is usually fixable but its just another potential problem that can be avoided by eliminating inline filters.