Two lines or three?
Quote from KEN's post.
"The carb on the BME44 won't get flooded when you fill, so crank away without worries."
With the diaphram carb, you don't have to worry about flooding the carb anyway.
Stomper mentioned that he uses a line with a clunk for filling. This is good for emptying as well (and most likely his purpose) You do not have to have that line with the clunk in your tank. Just turn your plane upside down and tip it forward so you can use the vent line to do the defueling. Helps keep the weight down.
I use the 3 line method and the only added weight is the little brass tube at the fuel tank. Works great.
Jeff C