Rather than, uhm "landing", I think that the most tricky part of the flight could have been take off: as you push the throttle the torque sinks one of the floats and lifts the other, with an unsimmetrical resistance in the water. So from the memories of M.llo Francesco Agello, seaplane speed recordman.
This was one of the reasons for the counter-rotating propellers in MC 72.
This was one of the reasons for the counter-rotating propellers in MC 72.