amazingly, I am not part of the spetrum cartel, and am using a Airtronics 2.4Ghz reciever which is known to be tempermental over 6v. I am not worried about the PTX, but the reciever and the servo are not only expensive, but also pretty critical items to work when racing
I am going to give it a spin this saturday without a booster or reciever pack with my Novak GTB 4 cell Spread Spectrum ESC and a 13.5 to see how it goes.