I built the PT 60 and used a Tower 72 FM 4 chanell. It cost about 109 bucks(with servos). I am now building a Tiger 60 and I will be buying the 2.4 Airtronics RDS8000. The thing about buying a radio you can grow with is you still have to buy a reciever when you buy a new plane. And recievers cost anywhere from 60 bucks on up. So my Tower4ch FM will always stay with my PT 60. AsI progress I will buy higher capability radios.