I have a question the the ones out there who are already sucessfully foiling. For the kite and surfoil, the rear stabilizier is always mounted upside down, so that it is creating downthrust, but gives better stability, as the force in kiting and surfing is way above the foil. For efoil, the driving force is nearly inline with the foil. So in my opinion the rear stabilizer should be mounted like in airplane, not upside down.
Hor are the rear stabilizer mounted on your efoils??