You will have to replace the stock ESC/RX to do that because the stock input is a different plug. I have the airtronics but from what I understand they discontinued it. It is a great servo and gives me great control in terms of 1/18 scale platform.
I have a like new Novak Micro Spy and AERC18 RX in one of my Mini-Ts and it's a great combo. However, I'm about to go brushless. I might be looking to sell my ESC/RX/Motor setup soon if you are looking to buy a brushed setup. I may even part with one of my 7.2v losi NiMH packs.