I am just now planning to use a fuel filter for the first time. One of the reasons I am going to install a filter between the tank and carb is that with a 2 line system (1 vent and 1 klunk) is that it is very difficult to remove the fuel line at the engine because of the tight engine installation and rear mounted needle valve. I will just cut the fuel line and install the filter. I believe for this particular plane (GP Super Sportster), it will make it a little easier to fuel and I can reap the benefits of the filter.

DaveB