Nice to see Grandad's teaching grandsons, and getting them involved in the hobby, and building models. The more the better. Good on you.
And congratulations to grandson for doing it, Hope enjoys doing it, and achievment when its done and on water. Mike C.👍

I have used a 10ch flysky transmitter for 2 yrs now, on an AZIZ TUG, controling 2 motors independantly, 1 bow thruster, rudder servo, fog horn, plus diesel sound system, and various led lighting systems controled by a bank of micro servos operating micro lever switches using the servo arms to press the micro swich levers to switch the various lighting circuits on and off. Deck lighting, mast and nav lights, deckhouse and cabin lighting.etc plus radar arial. 10chanels was superb no problem, have since lost my pride n joy in a house fire, really gutted as had finally finished all detailing and only got to use it 2/3 times b4 I completely finished it. Sadly lost as it belonged originally to a deceased club member who only managed to 3/4s build it, and I put a plaque on cabin deckhouse as tribute to him.as he'd done the major part of build, which I wasnt going to take credit for. Dave had done All Basics a tribute to him sadly lost in fire. I WILL Try and get another AZIZ And build an identical Tribute Boat to Dave. Mike C.

You dont say what motor your using, is it Brushed or Brushless, I have mostly brushless motors in my boats, and fit waterproof speed controllers which have integral cooling system which you can attach cooling pipes too. I also fit a curved brass water pick up pipe through hull bottom just behind prop between prop and rudder so water is forced though cooling system and ejected through a short brass pipe msde to look like an exhaust. You can also get watercooled esc's for brushed systems but depends on how much power level your goin to need as to how much heat will be generated. Lower power/speed usually doesnt need cooling of esc's.
Mike C.🤗