Just got a new Mini-C and i am looking to throw some spare parts into it. I am new to rc boating
I have a Castle Creation Sidewinder 6800 with a Mamba 25 controller. My questions are:

-Where do i get or how do i make a motor mount that will fit it with minimal hull modifications or new holes?

-What kind of prop do i need to match it to?

-Do i need to water cool it if i run it with NiMH batteries? How?

Thanks,

-H