Having a crane available in the workshop, I put the Rebel to the expected maximum positive angle of attack. So I put it into 15,5 degree positive angle and measured the fuel flow.
We put a minimum (5 liters) into each tank and measured the flow. Left tank delivered 24 and 32 liters per hour and carburator. Right tank delivered 20 and 19 liters per hour. All values are high over the required minimum for the Rotax. Calculating with 125% of maximum fuel consumption 15,6 liters per hour minimum is required.