Not forgetting the also useful - convert a servo into a speed controlled motor, i.e by using only the servo this stripped down leaving only the motor the pot, the circuit board and lead, using the motor to drive the boats propeller, the circuit board as the esc, the pot to find dead centre then glue it so it does not move (though with the high tec i used, i left it fitted through the bulkhead with reels on it to reset it as seemed to ghost during trials.
is it a single prop or dual, my 1/72 LCM III tank used two props so was steered this way, so two servos one for each prop and a hitec feather receiver, the battery was concealed under a crate as the load as I couldn't find the tank.