That made interesting reading,
India Four Two, and made me realize I am not much of an aircraft designer !
I read that Mitchel solved the takeoff problem of the torque submerging the LEFT float by making the RIGHT float larger.
Surely a mistake I thought: you should make the left float larger to give it more buoyancy.
However, Mitchel also moved fuel out of the left float and into the right float so the anti-torqu moment would remain after lift-off.
I now think my solution would have resulted in lift-off into a half roll and spectacular splash !