At first I built my Stinger with a fuel dot so I could fuel it thru a 3rd line. I had a line to the carb and a vent line coiled and run out the floor of the plane.

With the 3 line setup I often ended up with an air bubble in the carb line after fueling. After fooling around with this for a while, I realized that I could get to the carb nipple and just pull off the line to the carb for fueling/defueling. Felt kind of stupid adding a 3 line system when all I needed was the 2 lines.

The moral of the story is - if you can get to the carb, just pull the line and fuel from there.

At least I was able to use the fuel dot as a fill port for my smoke tank.