I totally agree Mike with the vent, but with the tank/clunk being higher than the carb, (which is how mine originally ended up with, inverted engine) the line from the tank to the carb will siphon, filling the carb with fuel. Once the flow starts it's hard to stop it unless you remove the source, or raise the carb line higher than the clunk. Like siphioning fuel out of a car gas tank. As long as the catch can is lower than the vehicle's gas tank, and you can get the fuel flowing, it will flow until you, remove the hose from the tank or raise the hose higher than the tank.

This was my experience with this plane, so I just thought I would share. Also it is my favorite plane to fly.