Greetings. I do have an cheaper / older version of the Foxeer Reaper whit 5 Watts. The hight tempertures are from the small antenna. It does not have enough material to shine the power around, so the reciever built it up and resisst it from it self. You need to make it from the 5W to the 1W, and of course bigger antennas. But even whit that it can get hot, because walls can reflect the Signal, again cousing resistance, building up heat. I plan to watercool my reciver, in my RC tank, whit a Honda 125cc clone pit bike engin.