ive got the spectrum SR3000 aswell and cant get mine to work. mine was bonded already in my tc3 i went to the track and someone was there already with my stock frequency so i was goin to put my spectrum in my rc18b but it had the same prob. just would not work. it worked fine one time run around the track for bout 4 min. then turn it off, turned it back on and it wouldnt work again. i dont know if it the 200 dollor car or the 300 radio but something would not work. persanaly i think it sucks i got a 300 dollor radio and cant get it to work with my rc18b marcus