If you put more blade on the rudders wyou will get much more lean in the turns.
I dont think it will be a good idea to have too much lean.
The boat looks very very nice, like said above the weight does need to go a tad forwards
this would also give you a nicer turn.
speed is very good,especially if both motors are comming off just the one battery.
amazing how quick the boat can stop.
seems like a very good all round set-up to me.
The sound of the motors is also pretty good, they dont sound like they are screaming to pieces
but maybe a slight less pitch could give even more run time.
The overall vid is very good. nice bit of camera work, and a very nice model to film.
what sort of price did the electric motors and esc cost ?
you have definitelt built a very fine boat
phill