I would like to mount my water rudder servo in the float. I am tired of messing with a long flexable cable etc....

I have a pair floats made by Ralph Smith from this site. They are great.

Has anyone ever cut a compartment into the top of the float and mounted a servo inside. If so, how do you water proof the opening for the servo, how do you run the arm out the top, do you have to extend the servo arm to stick out of the top?

Any ideas would be great or even better, pictures!

Thanks!