Nice...
What kv and v you using ?
Can show me inside of it too?
For your information, 380 brushed motor has sufficient power to sail at similar speed, but due to cooling problem, (I can not find water cooling coil for 380 motor), I use inrunner with cooling jacet.
The weight of B2445 motor with cooling jacket is a little bit heavier than 380 motor, this make the CG forward to the bow and the bow a little bit down to water. (Need to add weight at rear compartment to lift up the bow. )