I don't know if that would work (after doing a little testing today). When emptying my tank with back into my fuel jug, once the fuel reached the level of the top of the clunk I started getting very fine air-bubbles in the fuel line... I believe this would cause a lean condition. I'm not sure what the dynamics of having one large air bubble in the line are... anyone know? Would the bubble be "Passed" by the carb very quickly?

The big drawback for me is that the felt clunk left a lot of unusable fuel in the tank as it would draw in air at the same time as the fuel as soon as the a small piece of felt was exposed. I went with a very large and heavy simple clunk with a 3/16" ID.