I like the idea> I am sure the air pressure from the muffler will be sufficient to "overcome" extra length of the tubing. There is only one thing I'd like to point out. I am using a fueling system from the SlimLine, which is installed directly on the fuel jig. It has 2 lines - in and out. When I am fueling thi plane I am collectin "out" line to the (3rd) dot and "in" line to the pressure tube. In this case I have a complete circle for fuel to flow. The negative pressure created on the "in" line (because that's where pump is sucking the air) gives extra insurance that fuel will not flow to the carb (especially when carb is fulyclosed).