I found the smallest snap-shut "tupperware" tub that I could find. Unfortunately, it is just too tall.

So I made it less watertight

And then I made it more watertight again, using a bit of scrap plastic and some hot glue.

It just fits the monster old receiver and the tiny ESC, let's hope they don't interfere with each other. The battery obviously sits outside the box, as does the rudder servo, which is waterproof-enough (I have run the same one in my RC buggy in some pretty grotty conditions, it should be fine)

The rudder servo sits between two blocks of wood, hot-glued into the boat. Each of the wood block has a M3 hex standoff epoxied into a hole drilled in it, once everything is finalised I will be able to screw down a little cross-bar to hold the servo in place.

The rudder cable passes through two tubes (bicycle brake cable sheath, but I replaced the actual cable with some thinner, more flexible, stainless steel cable) out to the back. The pull-pull arrangement means that I can use thin flexible cable, since it doesn't have to apply any pushing force.

The cable passes through a hole in the rudder and is held in place one each side with a doodad who's name I can't remember.

All in all, the boat is ready to go! Unfortunately I loaned out my lone RC battery, so until I get that back the maiden voyage will have to wait. As they say, control without power is boring. Or something.

The next project log will either be "It Sank!" or "It Floated!"