I've read your comments, but am still a little unsure about something. The engine has a vent in the bottom of the crank case to drain excess oil. You are supposed to connect a fuel line to it and drain it through the bottom of your cowl. With the engine inverted, all that oil will be sitting in there sloshing around, and after a while wouldn't that hurt the performance. Does routing the fuel line below the crankcase help somehow? Thanks

Alex