hi friends this is my first scratch build cabin cruiser from 3mm form board i use brushless motor and 60 amp brushless esc and 7.4 volt 2500map lipo and she performs good i put cabin light and focus light and control on and off through old 9 gram servo removing motor and connect led +and- wire in motor connection centralize the servo pot and connect servo wire to channel 6 flap knob  

Looks good. Put it in the water now!

yesterday she was maiden in water and about half throttle she is rocket in just 2 cell lipo

Great work done! Please post some better pictures of the model. Do you have a video of the maiden?

I understand that you are looking for a 65cms Cabin Cruiser - why don't you try to build this out of the same foam board?

http://eezebilt.hobby-site.com/Seaprincess.html

Regards.