I am setting up my OS 140 and was going to use a 2 - tube setup. One open to vent on the bottom of the fuse, and a fuel dot with a "T" fitting on the feed line between the tank and pump for filling the tank. Is this going to work, or will it fill the carb when I fill the tank? OS instructions say to use fittings and run the line outside the fuse. Either way is fine although a fuel dot would look better. Thanks!