Rotax 912 fuel return line

[adam.rigden]

I have a Kitfox 5 Outback with a Rotax 912 UL 80hp. I want to add a fuel return line back to the header tank which from what I have read is the best possible option. My header tank is aluminum, and I have the optional fuel sensor so this port is not available for the return line. Can I "T" off one of the 4 ports for the return line? If so, any suggestions as to which would be the best one? I have been told that if i use the sensor port, I might get erroneous results. If I use the vent line or the fuel inlet ports will I get a "back flow" to either the tanks or up the vent line? I have attached a picture of my current installation. Any input would be greatly appreciated.