Question #6 (jldecarlo) I can handle. With all gassers, the best setup is to use two lines thru the stopper. One line goes to a clunk. The other line (vent) just stops in the top front of the tank. Route this vent line so that it exits at the bottom of the cowl (overflow). In upright flight, fuel cannot siphon out because the vent is in the airspace at the top of the tank. In inverted flight, the overflow line is higher than the tank so fuel cannot fall out.
Put a "T" in the line between the carb and the tank for fueling and de-fueling. plug this line after fueling.