[_paralyzed_]

Well, that would definitely be cool.

I fear Linc's suggestion of inverting it may end badly. It was designed knowing heat rises and the components are stacked in a way that the heatsink is on top to pull heat up as well as the fan pulling air up and out. You'd have to keep it awfully cool to compensate for that.

Additionally, motors and servos are pretty water proof the way they are. A little silicone around the case seam and some heavy grease around the output will waterproof a servo. A little tape and silicone will waterproof a motor.

I think in order to make this a reality you need to focus all of the cooling ability on the esc. Your cooling system will only remove so much heat, and I fear adding the servo and motor into the loop will over tax the system.

Focus on the esc, and if you end up with ice cold temps, then perhaps you can add the motor or servo.

Also since motors can run a little hotter than esc's trying to keep the motor cool enough that the esc won't overheat could really tax the system.

I'd like to see you accomplish this. Good luck.